Hungary eSIM for US Travelers (2026): The In-Person SIM ID Rule, Renamed Networks and the Serbian Border

Conclusion: For a trip to Hungary, install a data-only travel eSIM at home and keep your US line on for calls and texts. A Hungarian prepaid SIM gives you a local number and generous data, but since 2017 Hungarian law has barred operators from switching on a prepaid line before they check your ID, and without a Hungarian ID document that check is done on the passport you show in person, so plan on a store visit. On the listed prices compared below, eSIM4Travel is the cheapest at every size from 1 GB to 50 GB. Two Hungary-specific checks: older guides name networks that no longer exist (Telenor is now Yettel, Vodafone is now One, and 3G is gone), and if Serbia is on your route, your Hungary plan probably does not cover it.

What you will learn on this page:

• Why a Hungarian prepaid SIM means showing your passport at a counter, and the one online tourist option that exists.
• The renamed network map (Telekom, Yettel, One), what the end of 3G means, and why your eSIM’s network list matters.
• The southern border: why your phone can drift onto a Serbian network near Szeged, and what to switch on.
• Side-by-side prices for eSIM4Travel, Saily and Nomad, with the source and date of every number.
• Entry on a US passport (EES, no ETIAS yet), the U.S. advisory level, forints vs. cards, and tap-to-pay on the Budapest metro.

Hungary looks like an easy EU stop, and for data it mostly is. Two things make it different from its neighbors. The SIM card is an identity-checked product by law, and the mobile map has changed so much since 2022 that many guides still name operators that no longer exist. This page is built from Hungarian law and the telecom regulator NMHH, the three operators’ own pages, the European Commission, Hungary’s central bank, Nomad’s own page and eSIMDB’s price listings, and each number says where it comes from. If Hungary is part of a wider trip, the Cairnroam US traveler hub lists every country we have covered.

Why a Hungarian prepaid SIM means a trip to the store

Disclosure: This page contains affiliate links from which Cairnroam may earn a commission at no extra cost to you. Rules and Nomad’s and the operators’ prices were checked on 16 October 2026; Saily’s and eSIM4Travel’s prices are eSIMDB listings updated 4 October and 23 September 2026, as the table caption shows. Sources: Hungarian law, the NMHH, the European Commission, the operators’ own pages, the providers’ product pages and eSIMDB. — Mara Whitlock

In some countries you can buy a SIM from a kiosk and be online before you reach the taxi rank. In Hungary the law gets in the way. Section 129 of the Hungarian Electronic Communications Act (Eht.) requires the provider, before it concludes a prepaid mobile contract, to check the subscriber’s official ID against the state register of ID documents. Without a successful check, the contract cannot be concluded and the provider may not start the service. The regulator’s decree 22/2020 on subscriber contracts covers visitors: if you have no ID issued by a Hungarian authority, the check is done on the passport or other entry document you present in person. The same decree caps prepaid contracts at ten per person. The NMHH dates the current regime to 2017, when cards bought earlier had to be re-verified and new ones were checked before the contract.

So a tourist can get a Hungarian SIM, but not from the couch. Yettel tells foreigners without Hungarian ID to visit a Yettel store with a valid passport or residence permit, and says they cannot buy prepaid service online, on yettel.hu or by phone. One says the easiest way for a non-Hungarian to activate a pay-as-you-go SIM is to visit a One store. Telekom sells its data-only Travel SIM only in its stores, including one at Budapest Airport’s Terminal 2B arrivals level, and asks for a passport, ID card or driver’s license; its eSIM version cannot be bought online either. Prepaid lines also need an annual data reconciliation, which One and Yettel say foreign customers do in a store.

There is one online exception worth knowing. Yettel sells a data-only tourist eSIM called Yettel Pass on its English site. Yettel says some data is required by Hungarian law for identification, but its page does not explain how that is checked, so I cannot tell you whether you will need to show a passport. More on its prices and phone limits further down.

A travel eSIM works differently. In Hungary the ID check is the local operator’s duty before it may activate a prepaid line; a travel eSIM is bought from a foreign provider and works as roaming, so the in-store passport step is not part of buying it. What you give up is a Hungarian phone number, which matters more on a long stay than on a week in Budapest.

Your US plan gets no Roam Like At Home in Hungary

Hungary is in the EU, and the European Commission’s roaming page says Roam Like At Home applies automatically in the 27 EU countries plus Iceland, Liechtenstein, Norway, Ukraine and Moldova. That protects customers of EU operators. A Verizon, AT&T, T-Mobile or Google Fi line is not an EU SIM, so in Hungary you are on whatever international terms your US carrier sets. I am not printing US day-pass prices, because they vary by plan; look up your own before you go.

The setup I recommend instead: keep the US line on for calls and SMS codes, turn its data roaming off, and let a travel eSIM carry the data. An iPhone can run both lines at once, as Apple’s Dual SIM guide explains, and Apple’s travel eSIM page notes that FaceTime and iMessage keep working on your home line.

Telekom, Yettel and One: the renamed, 3G-free network map

If a guide tells you Hungary’s networks are Vodafone, Telenor and Magyar Telekom, it is out of date. The NMHH’s mobile market report for the second half of 2025 lists three network operators: Magyar Telekom, Yettel (the name Telenor Hungary has used since March 2022) and One (the new name of Vodafone Hungary). The parent company 4iG says Vodafone Hungary switched to the One name on 1 January 2025. By voice-active subscriptions at the end of 2025, the NMHH puts Telekom at 46%, One at 28% and Yettel at 25%, with the three holding 99% of subscriptions between them.

3G is gone. Telekom turned off its last 3G network in July 2022, as hvg.hu reported; Vodafone followed in 2023, and Yettel was the last, retiring 3G on 13 November 2023, according to DatacenterDynamics. The NMHH’s 2G page says Telekom and Yettel serve customers over one shared 2G radio network from 2026 and that 2G is expected to go at the earliest around 2028–30. For a visitor this matters mainly with a very old backup phone: the regulator counts about 1.3 million mostly push-button phones in Hungarian households that are not 4G-compatible. The travel eSIMs below are data-only, so calls go over WhatsApp, FaceTime or similar apps; I could not verify whether any of them supports VoLTE while roaming in Hungary.

Coverage, and why the network list matters

The operators report coverage differently, so attribute each number to its source. Telekom says its outdoor 5G reached 86% of the population at the end of 2025 and was still at 86% in its May 2026 press release. Yettel’s network page (undated) claims 4G for 99% of the population and 5G for 52%. One’s network page gives no percentage. These are population figures, not area, so they do not tell you about remote countryside, and I have no Hungarian source naming specific dead zones. For a national benchmark, Ookla’s Speedtest Global Index (August 2026) puts Hungary’s median mobile download at about 94 Mbps; that is a country figure, not a promise for any travel eSIM.

Here is the concrete reason to read the network list before you buy. Nomad’s Hungary page lists “Vodafone” (today’s One network) and Yettel, not Telekom, which is the operator reporting the highest 5G population coverage. eSIM4Travel’s Hungary family on eSIMDB lists all three networks under their old names: Telenor (Yettel), T-Mobile (Telekom) and Vodafone (One). Saily’s Hungarian networks are not listed in my sources, so I will not guess. For Budapest any of them should do; if you plan long days in the countryside, a plan that includes all three networks is a reasonable hedge.

The southern border: Serbia and Ukraine are not alike

Hungary borders two countries outside the EU, and they sit on different roaming footings. Since 1 January 2026, the European Commission says, Roam Like At Home has been extended to Ukraine and Moldova. Serbia is not covered. Yettel’s roaming page puts Ukraine in its EU-rate zone 1 and Serbia in zone 2, alongside Switzerland, the US and Turkey. Both Yettel and One tell their own customers to switch from automatic to manual network selection when they are near a border, and One mentions non-EU borders specifically, so the phone does not jump onto a foreign network by itself.

For a US traveler on a travel eSIM, the lesson is about coverage. Nomad’s Hungary plans cover Hungary only, and the Saily and eSIM4Travel plans in the table below are single-country plans too. On a Serbian or Ukrainian network, a Hungary-only plan may simply not connect; I could not verify what each provider does there, or whether their Europe-wide or Balkan plans include Serbia. If you are around Szeged or near the Ukrainian border, set your eSIM to manual network selection and keep your US line’s data roaming off. If Serbia is a stop on your route, check the coverage list before you buy, and see our Serbia eSIM guide for that leg.

Expect real border checks in this corner of Europe as well. The Serbian and Ukrainian crossings are EU external borders, and Germany’s Federal Foreign Office warns of longer waits there. Heading west, the Commission’s list of temporary internal border controls shows Austria checking its land border with Hungary from 16 September 2026 to 15 March 2027, so keep your passport handy when you cross into Austria; our Austria guide covers that side.

Hungary travel eSIM prices compared (October 2026)

Below are the single-country Hungary ladders for the three providers I cover. Only Nomad’s prices were read on the provider’s own page, on 16 October 2026; Saily’s and eSIM4Travel’s come from eSIMDB, with their update dates in the caption. All of these plans are data-only, with no Hungarian phone number.

Plan	eSIM4Travel (per eSIMDB)	Saily (per eSIMDB)	Nomad (provider page)
1 GB / 7 days	$1.23	$3.99	$4.50
3 GB / 30 days	$2.35	$7.99	$9.00
5 GB / 30 days	$3.38	$11.99	$12.50
10 GB / 30 days	$5.93	$18.99	$16.00
20 GB / 30 days	$11.05	$31.99	$20.00
50 GB / 30 days	$29.64	Not listed	$45.00
“Unlimited” daily cap	3 GB/day, then 1 Mbps	5 GB/day, then 1 Mbps	2 GB/day, then 1 Mbps
Networks	Telenor, T-Mobile, Vodafone (old names of Yettel, Telekom, One)	Not stated	Vodafone (One) and Yettel

Read straight across, eSIM4Travel is the cheapest at every listed size on eSIMDB’s prices, from $1.23 for 1 GB to $29.64 for 50 GB. Between the other two, Saily is cheaper at 1, 3 and 5 GB, and Nomad is cheaper at 10 GB ($16.00 against $18.99) and 20 GB ($20.00 against $31.99). Saily lists no single-country 50 GB plan.

None of the “unlimited” plans is truly unlimited; each is a daily allowance, after which speed drops to 1 Mbps. Nomad’s cost $11 for 3 days, $18 for 5 days, $25 for 7 days and $33 for 10 days, with 2 GB a day. Per eSIMDB, eSIM4Travel’s run from $6.88 for 3 days to $21.01 for 10 days with 3 GB a day, and Saily’s cost $18.99 for 5 days and $34.99 for 10 days with 5 GB a day. A daily-capped plan only pays off if you use several gigabytes on several days in a row; otherwise a fixed pack is cheaper.

Which eSIM I would pick for Hungary

• eSIM4Travel: the price leader at every size on these listings, and the only one of the three whose listing in my sources names all three Hungarian networks (Saily does not publish its networks there). Its Hungary page does not list prices in its page text, so the figures come from eSIMDB (updated 23 September 2026). Cairnroam has no discount code for eSIM4Travel, so no coupon applies; confirm the price at checkout.
• Nomad: the only ladder here read on the provider’s own Hungary page. It runs on One and Yettel, covers Hungary only, supports hotspot use, and the plan starts automatically when it first connects to a network, or 60 days after purchase, whichever comes first. Among the two coupon brands it is the cheaper choice at 10 and 20 GB. Our code ILEXBDNSXSBA takes $5 off, subject to Nomad’s coupon terms: on the 10 GB plan that is $16.00 minus $5, or $11.00, and on the 20 GB plan $15.00. The 1 GB plan costs less than $5, so I am not quoting a coupon price for it.
• Saily: the prices above are eSIMDB’s listing (updated 4 October 2026); confirm them on Saily’s Hungary page at checkout. Its “unlimited” plans have the largest daily allowance of the three, 5 GB a day, which suits several days of heavy streaming or laptop hotspotting. Our code CAIRNR6205 takes $5 off, subject to Saily’s coupon terms: on the 3 GB plan that is $7.99 minus $5, or $2.99. Even after either code, eSIM4Travel stays cheaper in those rows: $2.35 for 3 GB, $5.93 for 10 GB and $11.05 for 20 GB.

On sizing: for maps, messaging, transit and the odd photo upload, 3 GB over 30 days is comfortable for a week in Budapest; video calls, hotspotting a laptop or long drives on navigation are when 10 GB or more makes sense. If Hungary is one leg of a Central European loop, our guides to Austria, Slovakia and Serbia cover the common next stops.

When a Hungarian SIM or the Yettel Pass makes more sense

Hungarian plans come with generous data allowances, and a Hungarian line gives you a local number. The options visible to visitors on the operators’ sites, checked on 16 October 2026, all priced in forints:

• Yettel Pass (online tourist eSIM): Pass S, unlimited data in Hungary for 3 days, HUF 3,000; Pass M, unlimited in Hungary for 7 days, HUF 7,000; Pass L, 30 GB in Hungary and the EU for 30 days, HUF 9,000 (Yettel shows this as about €24). It comes with a Hungarian number and starts on first connection. The catch: Yettel says it works only on 5G-capable phones and lists the iPhone XR, XS, XS Max, 11, 11 Pro, 11 Pro Max and SE (2nd generation) as not compatible. The EU data allowances for Pass S and M differ between the plan cards and the FAQ on the same page, so I am not quoting them.
• Telekom Travel SIM (store only): 20 GB for 10 days, HUF 10,000, or 100 GB for 30 days, HUF 15,000, usable in Hungary and the EU; data only, no top-up, validity counted from the purchase date. You buy it in a Telekom store, including at the airport, with a passport.
• One Tuti prepaid: the SIM costs HUF 500 online or at resellers and HUF 1,500 in One stores, with add-ons such as 5 GB for HUF 2,290 or 20 GB for HUF 4,990, per One’s prepaid page. As a non-Hungarian you activate it in a One store.

For a rough sense in euros, Hungary’s central bank set the official rate at 364.18 forints per euro on 15 October 2026, which puts the Telekom 20 GB SIM at approximately €27.5. Compare that with a 20 GB travel plan between $11.05 and $31.99 in the table above, bought before you fly with no passport step. If you are staying a month or need a Hungarian number for a rental or a booking, the local route is worth the counter visit. For a week, the travel eSIM is less fuss.

Entering Hungary on a US passport

Hungary applies the common Schengen visa list; the European Commission’s visa policy page explains how it works. Germany’s Federal Foreign Office, in its Schengen-based visa list, shows the United States as visa-free, limited to 90 days in any 180-day period with no work. Two newer rules:

• EES on first entry. The Commission’s Entry/Exit System registers non-EU nationals’ fingerprints and facial images for short stays. It became fully operational on 10 April 2026 and replaces passport stamping, at Budapest Airport as well as at the Serbian and Ukrainian land crossings. The first registration takes extra time.
• No ETIAS yet. The Commission says ETIAS is currently not in operation and no applications are being collected; it will announce a start date several months in advance.

For safety, the U.S. Embassy in Hungary shows Hungary at Travel Advisory Level 1, Exercise Normal Caution. Check the State Department’s country page for Hungary before you travel, as levels can change. One rule US visitors rarely expect: Japan’s Foreign Ministry, in its Hungary safety data, notes that foreigners in Hungary are required to carry ID at all times, which for a tourist means the passport. You will also need it to buy a local SIM in a store.

Forints, the metro and emergencies: why data helps from day one

Carry some forints

Hungary’s currency is the forint (HUF), not the euro. The central bank’s 2025 payment systems report found that 84% of shops definitely accept electronic payment and that more than a quarter of card purchases were made with a phone wallet. But only 43% of in-store purchases were electronic in 2024, so the remaining 57% were not electronic, which in practice means mostly cash. Cards and phone wallets will cover most shops; keep some forints for the rest. Exchange money only at banks, licensed exchange offices or hotels: Germany’s Federal Foreign Office advises against anything else, and Japan’s Foreign Ministry says exchanging outside official changers is illegal, with both parties punishable.

Tap your card on the Budapest metro

Since 22 April 2026, Budapest’s transit authority BKK has offered Pay&GO on all metro lines and the 100E airport express bus: tap a contactless bank card or phone once to buy and validate a single ticket, with no registration, app or paper ticket. To show an inspector, you repeat the same tap on their checker. The old validators remain for paper tickets and BudapestGO app tickets, and BKK plans the full rollout across the network later, so on other lines validate your ticket; Japan’s Foreign Ministry notes spot checks and fines.

112, 107 and your US line

In an emergency, dial 112, which takes calls in English; Hungary also has 107 for police, 104 for an ambulance and 105 for fire, per the same safety data. The European Commission notes that 112 works free of charge everywhere in the EU. A data-only eSIM has no phone number, so keep your US line switched on for calls and texts.

Arrival checklist for Hungary

1. Check your phone: it must support eSIM (on iPhone, an XS, XS Max, XR or later) and be unlocked. In Settings > General > About, “No SIM restrictions” next to Carrier Lock means it is unlocked; per Apple’s unlock guide, only your carrier can unlock it.
2. Buy and install the eSIM at home on Wi-Fi, and read the network list. If Serbia is on the route, make sure the coverage list includes it.
3. On landing, set the travel eSIM as your data line, keep your US line on for calls and SMS, and turn the US line’s data roaming off.
4. Near the Serbian or Ukrainian border, set network selection to manual.
5. Carry your passport at all times, and some forints for places that do not take cards.
6. On the metro or the 100E bus, tap your contactless card or phone; on other lines, validate your ticket.

FAQ

Can a tourist buy a prepaid SIM in Hungary?

Yes, but usually in person. Hungarian law bars operators from activating a prepaid line before they verify your ID, and without Hungarian ID that check is done on the passport you present in person. Yettel and One send foreigners to their stores, and Telekom sells its Travel SIM in stores, including at Budapest Airport. Yettel also sells a Yettel Pass tourist eSIM online, without saying how ID is checked.

Does my US phone plan get free EU roaming in Hungary?

No. Roam Like At Home covers customers of EU operators. A US carrier’s line roams on that carrier’s own international terms, so check your plan before you go.

Which travel eSIM is cheapest for Hungary?

On the listed prices in our table, eSIM4Travel is cheapest at every size, from $1.23 for 1 GB over 7 days to $29.64 for 50 GB over 30 days (per eSIMDB, updated 23 September 2026). Between Saily and Nomad, Saily is cheaper at 1 to 5 GB and Nomad at 10 and 20 GB.

Are Vodafone and Telenor still networks in Hungary?

Not under those names. Telenor Hungary became Yettel in March 2022, and Vodafone Hungary became One on 1 January 2025. The three networks are Telekom, Yettel and One. Some eSIM pages still use the old names.

Will my phone fall back to 3G in rural Hungary?

No. Hungary has had no 3G since Yettel switched its network off in November 2023. 2G still runs and is expected to go at the earliest around 2028–30, according to the NMHH.

Does a Hungary eSIM work in Serbia?

Do not assume it does. Serbia is outside EU roaming, and single-country Hungary plans such as Nomad’s cover Hungary only. If Serbia is on your route, buy a plan whose coverage list includes it, and set manual network selection near the border.

Are unlimited eSIM plans for Hungary really unlimited?

No. They are daily allowances: Nomad 2 GB a day, eSIM4Travel 3 GB a day and Saily 5 GB a day, after which speed drops to 1 Mbps.

Do I need ETIAS or EES for Hungary?

EES applies: on your first entry you register fingerprints and a facial image at the border, with nothing to do in advance. ETIAS is not in operation yet, and no applications are being collected.

Can I pay for the Budapest metro with my phone?

Yes. Since 22 April 2026, BKK’s Pay&GO lets you tap a contactless bank card or phone on all metro lines and the 100E airport bus, with no app or registration. On other lines, use a validated ticket or a BudapestGO app ticket.

What number do I call in an emergency in Hungary?

Dial 112 (English is spoken), or 107 for police, 104 for an ambulance and 105 for fire. Keep your US line on, because a data-only eSIM has no number for calls or texts.

References and further reading

1. Act C of 2003 on Electronic Communications (Eht.), Jogtár: Section 129, ID check before a prepaid contract.
2. NMHH Decree 22/2020 on subscriber contracts, National Legislation Database: in-person check for holders of non-Hungarian ID; ten-contract cap.
3. NMHH — Prepaid subscriptions: data reconciliation (2017): the 2017 start of pre-contract ID checks.
4. NMHH — Mobile market report, second half of 2025: operators, renames and market shares.
5. 4iG — One brand unites telecom retail services: Vodafone Hungary renamed One from 1 January 2025.
6. NMHH — Preparing for the 2G switch-off (18 September 2025): 3G completed, shared 2G network, 2G off around 2028–30.
7. hvg.hu — Telekom switches off its 3G network (1 July 2022).
8. DatacenterDynamics — Yettel to wave goodbye to 3G in Hungary (13 October 2023).
9. Magyar Telekom — Press release, 12 May 2026: 5G population coverage.
10. Yettel — Network: 4G and 5G population coverage (operator claim).
11. Ookla — Speedtest Global Index, Hungary (August 2026): median mobile download.
12. Yettel — Annual data reconciliation for prepaid: store visit for customers without Hungarian ID.
13. One — For foreign visitors: store activation for non-Hungarians.
14. Magyar Telekom — Travel 5G Data SIM / Visiting Hungary: store-only sale, ID required, prices.
15. Yettel — eSIM Hungary (Yettel Pass): tourist eSIM prices and compatible devices.
16. One — Tuti prepaid: SIM fee and data add-ons.
17. Yettel — Roaming: price zones and manual network selection.
18. One — Roaming: manual network selection near non-EU borders.
19. European Commission — Roaming: Roam Like At Home scope, Ukraine and Moldova since 2026.
20. European Commission — Temporary reintroduction of border control: Austria’s checks on the Hungarian border.
21. German Federal Foreign Office — Hungary travel and safety advice: border waits, money exchange.
22. European Commission — Visa policy: the common Schengen visa lists.
23. German Federal Foreign Office — Visa requirement list: US passport holders, 90 days in 180.
24. European Commission — Entry/Exit System (EES): fully operational since 10 April 2026.
25. European Commission — ETIAS: current status.
26. U.S. Embassy in Hungary: Travel Advisory Level 1.
27. U.S. Department of State — Hungary country information: check the current advisory before you travel.
28. Ministry of Foreign Affairs of Japan — Hungary safety data: carrying ID, money exchange, ticket validation, emergency numbers.
29. Magyar Nemzeti Bank — Payment Systems Report 2025 (PDF, Hungarian): electronic payment shares and acceptance.
30. Magyar Nemzeti Bank — Official exchange rates: EUR rate of 364.18 forints on 15 October 2026.
31. BKK — Buy and validate your single ticket with a single tap (22 April 2026): Pay&GO on the metro and the 100E.
32. European Commission — 112: the EU emergency number.
33. Nomad — Hungary eSIM: plans, networks, coverage and activation window.
34. eSIMDB — Nomad Hungary: cross-check of Nomad’s ladder.
35. eSIMDB — Saily Hungary: plan ladder, updated 4 October 2026.
36. eSIMDB — eSIM4Travel Hungary: plan ladder and networks, updated 23 September 2026.
37. eSIM4Travel — Hungary eSIM: provider page (no price source).
38. Saily — Hungary eSIM: provider page (no price source).
39. Apple — Using Dual SIM with an eSIM: eSIM-capable iPhone models.
40. Apple — How to unlock your iPhone for use with a different carrier: checking carrier lock.
41. Apple — Use eSIM while traveling internationally: keeping your home line for iMessage and FaceTime.

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Last updated: 2026-10-16