Cost Comparison
Bulgaria: Roaming Charges vs eSIM Prices, Carrier by Carrier (2026)
Carrier roaming in Bulgaria costs $6-$10/day across 4 carriers. A travel eSIM on A1 Bulgaria's network costs $0.77/GB. Both access the same 4G LTE towers. The price gap is 6.2x.
Roaming costs by carrier
Vodafone in Bulgaria
Plan
Roaming Passport
Daily rate
£6/day
7-day cost
£42
14-day cost
£84
Vodafone pays A1 Bulgaria for roaming access in Bulgaria and bills you £6/day. A travel eSIM connects to A1 Bulgaria directly at $0.77/GB — same towers, no markup.
EE in Bulgaria
Plan
Roam Abroad
Daily rate
£6/day
7-day cost
£42
14-day cost
£84
EE routes through A1 Bulgaria towers in Bulgaria at £6/day — the same network an eSIM reaches from $0.77/GB.
AT&T in Bulgaria
Plan
International Day Pass
Daily rate
$10/day
7-day cost
$70
14-day cost
$140
A1 Bulgaria operates the 4G LTE towers in Bulgaria. AT&T resells access at $10/day. An eSIM accesses A1 Bulgaria directly from $0.77/GB.
Verizon in Bulgaria
Plan
TravelPass
Daily rate
$10/day
7-day cost
$70
14-day cost
$140
A1 Bulgaria operates the 4G LTE towers in Bulgaria. Verizon resells access at $10/day. An eSIM accesses A1 Bulgaria directly from $0.77/GB.
eSIM costs by provider
Metered plans (1GB-20GB)
| Tier | Price | Per GB |
|---|---|---|
| 1GB | $2.21 | $2.21 |
| 3GB | $3.47 | $1.16 |
| 5GB | $5.20 | $1.04 |
| 10GB | $8.06 | $0.81 |
| 20GB | $17.03 | $0.85 |
Unlimited daily plans
| Days | Price | Per Day | Discount |
|---|---|---|---|
| 1 days | $2.52 | $2.52 | 4% |
| 3 days | $7.23 | $2.41 | 8% |
| 7 days | $16.87 | $2.41 | 8% |
| 14 days | $32.65 | $2.33 | 11% |
| 30 days | $64.45 | $2.15 | 18% |
Network access
eSIM plans in Bulgaria connect to A1 Bulgaria's 4G LTE network — the same towers that carrier roaming uses. Bulgaria has 3 mobile networks. Your eSIM routes through the primary carrier for the best coverage.
Side-by-side comparison
7-day trip comparison
| Option | Cost | Data | Speed | Network |
|---|---|---|---|---|
| Vodafone | £42 | Fair-use | LTE | A1 Bulgaria |
| EE | £42 | Fair-use | LTE | A1 Bulgaria |
| AT&T | $70 | Plan data | LTE | A1 Bulgaria |
| Verizon | $70 | Plan data | LTE | A1 Bulgaria |
| eSIM (20GB) | $17.03 | 20GB | 4G LTE | A1 Bulgaria |
| eSIM (Unlimited) | $18.34 | Unlimited | 4G LTE | A1 Bulgaria |
14-day trip comparison
| Option | Cost | Data | Speed | Network |
|---|---|---|---|---|
| Vodafone | £84 | Fair-use | LTE | A1 Bulgaria |
| EE | £84 | Fair-use | LTE | A1 Bulgaria |
| AT&T | $140 | Plan data | LTE | A1 Bulgaria |
| Verizon | $140 | Plan data | LTE | A1 Bulgaria |
| eSIM (20GB) | $17.03 | 20GB | 4G LTE | A1 Bulgaria |
| eSIM (Unlimited) | $36.68 | Unlimited | 4G LTE | A1 Bulgaria |
Per-day rate breakdown
AT&T charges $10/day. A 10GB eSIM spread across 5 days costs $1.61/day — 6.2x cheaper on the same A1 Bulgaria 4G LTE network.
Hidden charges
Auto-enrollment and day-one billing
AT&T and Verizon roaming passes activate automatically when your phone connects to A1 Bulgaria's network in Bulgaria. Calendar-day billing means arriving at 11:30 PM and leaving before midnight the next day counts as two full day charges. A single background app refresh on landing triggers the first charge.
Speed throttling and data caps
T-Mobile's free international data runs at 256 Kbps — too slow for Google Maps, Instagram, or video calls. Xfinity Mobile caps high-speed data at 200 MB per day before throttling. AT&T and Verizon do not publish their throttling thresholds, but users report speed reductions on sustained high-bandwidth use.
Voicemail and background app charges
Checking voicemail abroad is treated as an inbound international call. If the day pass has not yet activated, that single voicemail retrieval triggers the full daily charge. Background app sync, push notifications, and automatic app updates all count toward data usage and can activate the daily pass without your knowledge.
Fair-use caps on UK carriers
Vodafone and EE apply unpublished fair-use data thresholds for Bulgaria roaming. Once exceeded, speeds drop to 2G-equivalent rates while the daily charge continues. The exact threshold depends on your home plan tier and is not disclosed on the rate card.
Carrier rate analysis for Bulgaria
AT&T International Day Pass
AT&T's roaming agreement for Bulgaria routes your data through A1 Bulgaria. This is the same network a travel eSIM connects to. AT&T pays A1 Bulgaria a wholesale rate and marks it up to $10/day at retail. eSIM providers use similar wholesale agreements and price at $0.77/GB. The markup is the product. AT&T's Day Pass sells network access that costs less through an eSIM. 5-day comparison: AT&T $50 vs eSIM $8.06 on identical A1 Bulgaria 4G LTE infrastructure.
Verizon TravelPass
Verizon TravelPass charges per line. A couple traveling to Bulgaria: 2 lines x $10/day x 5 = $100. A family of four: $200. Each line triggers independently. A sleeping child's phone syncing a game update at midnight adds $10 to that line. eSIM alternative: $32.24 for four 10GB plans on A1 Bulgaria. Family savings: $167.76.
T-Mobile International
T-Mobile Go5G Plus includes 5 GB of high-speed international data in select destinations. Whether Bulgaria qualifies depends on T-Mobile's current destination list, which changes without notice. If Bulgaria is included, Go5G Plus customers get 5 GB at full speed. After 5 GB, speed drops to 256 Kbps for the remainder of the billing cycle. A 10GB eSIM at $8.06 provides a defined data bucket with no guessing about destination eligibility or mid-trip throttling.
Vodafone Roaming Passport
Vodafone applies a fair-use data cap to roaming in Bulgaria. The threshold is not prominently published. Once exceeded, speeds drop while the GBP6/day charge continues. A traveler who streams video or joins video calls may hit the cap within 2-3 days. A 10GB eSIM at $8.06 states its data ceiling upfront. Speed remains at full 4G LTE until the plan is consumed. No hidden threshold, no surprise throttle mid-trip.
EE Roam Abroad
EE and Vodafone both charge GBP6/day for Bulgaria roaming. Both route through A1 Bulgaria's 4G LTE towers. Neither offers a lower rate for this destination. The only difference is fair-use thresholds, which neither carrier publishes prominently. A 10GB eSIM at $8.06 states its data limit upfront and maintains full speed until consumed. Over 5 days: EE GBP30, Vodafone GBP30, eSIM $8.06.
Xfinity Mobile International Pass
Xfinity Mobile International Pass for Bulgaria: $10/day with a 200 MB daily high-speed cap. After 200 MB, data throttles to 2G-equivalent speeds for the rest of the calendar day. 200 MB covers roughly 4 hours of Google Maps navigation or 15 minutes of video calling. Most travelers exceed 200 MB before lunch. Over 5 days: $50 total, with throttled speeds most of each day. A 10GB eSIM at $8.06 provides the full data allocation at 4G LTE with no daily cap.
Three UK Go Roam
UK carrier comparison for Bulgaria: Three Go Roam: £2/day (£10 for 5 days). Vodafone Roaming Passport: £6/day (£30). EE Roam Abroad: £6/day (£30). Three is the cheapest UK carrier for Go Roam destinations. A 10GB eSIM at $8.06 is cheaper than all three UK carriers for any Bulgaria trip over 2 days.
MVNO roaming comparison
Boost Mobile's international options for Bulgaria are limited to add-on packs that provide small data allotments (typically 100-500 MB) at $5-$10 per pack. A 500 MB Boost pack runs out in under 2 hours of normal smartphone use. A 10GB eSIM at $8.06 on A1 Bulgaria provides 20x more data than a Boost international pack. Boost customers should install a travel eSIM before departure.
Rate summary
AT&T (International Day Pass): AT&T International Day Pass costs 520% more than an eSIM for Bulgaria.
Verizon (TravelPass): Verizon TravelPass costs 520% more than an eSIM for Bulgaria.
T-Mobile (Magenta (high-speed add-on)): T-Mobile's paid high-speed tier costs more than AT&T and more than an eSIM.
Vodafone (Roaming Passport): Vodafone rest-of-world rate exceeds eSIM cost for any trip over 1 day to Bulgaria.
EE (Roam Abroad): EE Roam Abroad costs more than an eSIM for Bulgaria at all trip lengths.
Bill shock scenarios
Scenario: you need an Uber from Sofia (SOF) to your hotel in Bulgaria. The Uber app uses 5-10 MB to load, request a ride, and track the driver. On AT&T pay-per-use: $15.37 for one ride request. Google Maps navigation to verify the route: $46.12 for 15 minutes. Total for one airport transfer: $61.5. AT&T Day Pass: $10 covers unlimited rides for the day. eSIM on A1 Bulgaria: $8.06 covers 5 days of rides.
How to switch to an eSIM
Setting up dual-SIM for Bulgaria (works with any US carrier): Your phone runs two SIMs simultaneously: the home carrier SIM and the travel eSIM. Home SIM role: calls and texts only. Data roaming OFF. WiFi Calling ON. eSIM role: all mobile data on A1 Bulgaria's 4G LTE network at $17.03 for 20GB. How they work together: incoming calls arrive on your US number via WiFi Calling routed over the eSIM's data connection. iMessage and WhatsApp stay tied to your home number. Maps, browsers, and apps use the eSIM's data. AT&T/Verizon/T-Mobile cannot bill roaming charges when data roaming is disabled on their SIM.
Is eSIM cheaper than roaming in Bulgaria?
A 10GB eSIM for Bulgaria runs $8.06 on A1 Bulgaria's 4G LTE network. AT&T International Day Pass charges $50 for 5 days using the same A1 Bulgaria towers. Switching from carrier roaming to eSIM saves $41.94 per device. Rates verified June 2026.
Should I use eSIM or roaming in Bulgaria?
An eSIM avoids the hidden costs of roaming in Bulgaria. Carrier roaming charges $10 per calendar day, triggered by background data sync the moment you land. An eSIM charges $8.06 flat for 10GB over 5 days on A1 Bulgaria. No per-day billing traps. Bulgaria airports sell local SIMs, but eSIM skips the queue and registration requirements. Verified June 2026.
Does T-Mobile work in Bulgaria?
T-Mobile provides free data in Bulgaria, but at 256 Kbps. That speed cannot load Google Maps, use ride-hailing apps, or stream audio. T-Mobile's high-speed International Pass costs $5-15/day. A travel eSIM on A1 Bulgaria's 4G LTE network costs $8.06 for 10GB over 5 days. Verified June 2026.
What is the best way to get data in Bulgaria?
Buy a travel eSIM before your Bulgaria trip. It costs $8.06 for 10GB and activates on A1 Bulgaria's 4G LTE network when you land. No airport lines, no passport registration, no daily billing. Carrier roaming costs $50 for the same 5 days. Bulgaria has good public WiFi, but cellular data provides reliable coverage everywhere. Verified June 2026.
Our verdict for Bulgaria
When carrier roaming makes sense
Carrier roaming makes sense for 1-day layovers where the $10 charge is less than the effort of installing an eSIM. Travelers who need voice calling to local Bulgaria numbers may also prefer their carrier plan, since eSIM data plans do not include voice service.
When an eSIM wins
For any trip longer than 2 days, an eSIM saves money over carrier roaming in Bulgaria. Families and groups save even more because carrier charges multiply per person. Countries with airport SIM queues make eSIM especially valuable — install before departure, activate on landing.
Bottom line for Bulgaria
For a 5-day trip to Bulgaria, an eSIM saves $41.94 vs AT&T and delivers the same 4G LTE connection on A1 Bulgaria's network.
Bulgaria connectivity details
Local network infrastructure
Bulgaria has 3 mobile networks. Primary carriers: A1 Bulgaria, Vivacom, Yettel BG. Both carrier roaming and eSIM connect to these same networks.
Download speeds and 5G
Average download speed: 132 Mbps. 5G coverage is limited in Bulgaria. 5G trials in Sofia
Quick tip
Bulgaria draws 13M (2024) international visitors per year. Carrier roaming is the default for most — the price comparison takes less time than the airport immigration queue.
Quick tip
Traveling to Bulgaria during Jun-Sep? Book your eSIM before departure — airport SIM counters have longer wait times in peak months.
Frequently asked questions
- Is roaming or eSIM better for Bulgaria?
- For trips longer than 2 days, an eSIM is cheaper than carrier roaming in Bulgaria. AT&T charges $10/day while an eSIM costs $8.06 total for a 5-day trip. Both use A1 Bulgaria's 4G LTE network — the only difference is the price.
- What hidden charges does AT&T have for Bulgaria roaming?
- AT&T's International Day Pass auto-activates when your phone connects to A1 Bulgaria's network in Bulgaria. Calendar-day billing means arriving at 11 PM costs a full $10. Background app sync, voicemail retrieval, and notifications can trigger the daily charge on days you intended to stay offline.
- Do eSIMs use the same network as carrier roaming in Bulgaria?
- Both eSIM and carrier roaming connect to A1 Bulgaria's 4G LTE towers in Bulgaria. The network, coverage area, and download speeds are identical. The difference is pricing: carriers charge $10-$15/day while eSIMs charge a flat rate for the entire trip.
- Is T-Mobile roaming really free in Bulgaria?
- T-Mobile Magenta includes free data in Bulgaria, but speed is throttled to 256 Kbps. That is too slow for maps, video calls, or photo uploads. The high-speed add-on costs $15/day — more expensive than most eSIM plans.
- Can I use eSIM and keep my carrier number in Bulgaria?
- Dual-SIM phones (most models since 2019) run both your carrier SIM and the travel eSIM simultaneously. Your home number stays active for calls and texts over WiFi. The eSIM handles all data on A1 Bulgaria's 4G LTE network in Bulgaria.
- What speed does carrier roaming get in Bulgaria?
- Carrier roaming in Bulgaria connects to A1 Bulgaria's 4G LTE network — the same towers and speeds that an eSIM uses. AT&T and Verizon offer LTE speeds through their day pass. T-Mobile's free tier is capped at 256 Kbps unless you pay for the high-speed add-on.
- Does Verizon auto-charge for roaming in Bulgaria?
- Verizon TravelPass activates automatically when your phone connects abroad in Bulgaria. A single background data transfer triggers the $10/day charge. The only way to avoid it is to disable data roaming in your phone settings before landing.
- How do UK carrier rates compare for Bulgaria?
- Vodafone and EE charge £6/day for Bulgaria roaming outside their EU free-roaming zone. That is roughly $7.50/day at current exchange rates. An eSIM on A1 Bulgaria's network costs $8.06 for the entire trip.
- How much does carrier roaming cost in Bulgaria?
- T-Mobile includes Bulgaria in its free international plan, but throttles every connection to 256 Kbps — one-eighth the speed of basic 2G. AT&T costs $10/day, Verizon costs $10/day. A travel eSIM on A1 Bulgaria at $2.21 for 1GB provides full 4G LTE — the same towers, none of the speed cap, and less money than either paid carrier option.
- Is T-Mobile's free international data fast enough in Bulgaria?
- No. T-Mobile caps free international data at 256 Kbps in Bulgaria — one-eighth the speed of basic 2G. At that rate, Google Maps takes 15+ seconds to load a single tile and will not work for navigation. Streaming video requires at least 1.5 Mbps; video calls need 2 Mbps. Basic WhatsApp text messages work, but anything else does not. T-Mobile's high-speed add-on for Bulgaria costs $15/day. A travel eSIM on A1 Bulgaria's 4G LTE network delivers full local speeds at $0.77/GB — cheaper per GB than the speed upgrade.
- How is my roaming bill calculated in Bulgaria?
- Your carrier uses one of two models. Per-day billing: AT&T charges $10 and Verizon charges $10 for each calendar day your phone connects in Bulgaria — even if you only check a notification at midnight. Per-MB billing: without a day pass, AT&T charges $2.05 per megabyte, which adds up to $2,099 per GB. Both models penalize casual background data usage. A travel eSIM uses flat-rate billing — you pay 1GB for $2.21 upfront, with no per-day activations and no per-MB overages. Once purchased, the cost is fixed regardless of usage patterns.
- Can I get a refund on a travel eSIM for Bulgaria if I don't use it?
- Refund policies vary by provider. Most eSIM providers offer a full refund only if the plan has never been installed or activated. Once the QR code is scanned and the profile downloaded to your device, refunds are rarely issued even if you never traveled. AT&T International Day Pass at $10/day can be cancelled before departure — your account is only billed on days the pass activates in Bulgaria. For an eSIM on A1 Bulgaria at $0.77/GB, read the refund clause before purchase. Plans under $10 total carry no refund window regardless of usage. Rates checked June 2026.