Savings Calculator
How Much You Save with eSIM vs Carrier Roaming in Saint Martin (2026)
A 10-day trip to Saint Martin costs $100 in AT&T roaming. A 20GB eSIM costs $18.64 on Orange's network. You save $81.36 (81%). Enter your trip length below to calculate your savings.
Your carrier's roaming rate in Saint Martin
| Carrier | Plan | Daily Rate | 7-Day Cost |
|---|---|---|---|
| AT&T | International Day Pass | $10/day | $70 |
| Verizon | TravelPass | $10/day | $70 |
| T-Mobile | Magenta (high-speed add-on) | $15/day | $105 |
| Xfinity Mobile | International Pass | $10/day | $70 |
AT&T International Day Pass
In Saint Martin, AT&T connects to Orange towers at $10/day. An eSIM reaches the same towers from $0.86/GB.
Verizon TravelPass
Verizon's day pass covers data and calls to the US. Texts to local Saint Martin numbers are billed separately at $0.25-$0.50 per SMS in some plan tiers. Verify before sending local contact messages abroad.
T-Mobile Magenta (high-speed add-on)
T-Mobile's $15/day pass in Saint Martin draws from your existing home-plan data bucket. Customers on base-tier plans with 5GB/month find they exhaust home data faster when roaming counts against the same pool.
Xfinity Mobile International Pass
Xfinity Mobile's $10/day pass in Saint Martin draws from your existing home-plan data bucket. Customers on base-tier plans with 5GB/month find they exhaust home data faster when roaming counts against the same pool.
eSIM alternative cost for Saint Martin
Plan tiers for Saint Martin
| Tier | Price | Per GB |
|---|---|---|
| 1GB | $1.14 | $1.14 |
| 3GB | $3.20 | $1.07 |
| 5GB | $4.93 | $0.99 |
| 10GB | $8.56 | $0.86 |
| 20GBBest fit | $18.64 | $0.93 |
Unlimited daily option
| Days | Price | Per Day | Discount |
|---|---|---|---|
| 1 days | $2.27 | $2.27 | 4% |
| 3 days | $6.51 | $2.17 | 8% |
| 7 days | $15.20 | $2.17 | 8% |
| 14 days | $29.41 | $2.10 | 11% |
| 30 days | $58.06 | $1.94 | 18% |
Which provider covers Saint Martin
The primary provider for Saint Martin is Airalo, connecting to Orange's 5G network. Compare all eSIM providers
Savings breakdown
| Trip Length | AT&T | Verizon | T-Mobile HS | eSIM | You Save |
|---|---|---|---|---|---|
| 3 days | $30 | $30 | $45 | $4.93 | $25.07 (84%) |
| 7 days | $70 | $70 | $105 | $18.64 | $51.36 (73%) |
| 14 days | $140 | $140 | $210 | $18.64 | $121.36 (87%) |
| 21 days | $210 | $210 | $315 | $18.64 | $191.36 (91%) |
| 30 days | $300 | $300 | $450 | $18.64 | $281.36 (94%) |
Family and group savings
Carrier roaming charges multiply per person. eSIM savings multiply even faster for groups.
Solo traveler
Carrier: $100
eSIM: $18.64
Save $81.36
Couple
Carrier: $200
eSIM: $37.28
Save $162.72
Family of 4
Carrier: $400
eSIM: $74.56
Save $325.44
Trip length calculator
How much data you need
Maps & navigation
50 MB/hr
Social media
80 MB/hr
Video calls
250 MB/hr
Photo uploads
10 MB/photo
Music streaming
70 MB/hr
Web browsing
60 MB/hr
Real savings scenarios for Saint Martin
Solo traveler
Solo trip to Saint Martin, 10 days. AT&T: $10/day x 10 = $100. Verizon: $10/day x 10 = $100. T-Mobile high-speed: $15/day x 10 = $150. eSIM 20GB on Orange: $18.64. The eSIM saves $81.36 vs AT&T, $81.36 vs Verizon, and $131.36 vs T-Mobile's paid tier.
Family trip
Families with mixed carriers — one parent on AT&T, one on Verizon, kids on T-Mobile — face $50/day in combined roaming for Saint Martin. Over 10 days: $500. Four eSIMs on Orange at $18.64 each: $74.56. Savings: $425.44. One purchase per person, no coordination between carriers.
Business trip
Five employees attending a conference in Saint Martin for 5 days: AT&T roaming for the team: 5 x $10/day x 5 = $250. Five 20GB eSIMs: $93.20. Team savings: $156.80. All five connect to Orange's 5G network. The eSIM receipts are cleaner for expense processing: one charge per person, no daily line items.
Long-stay and digital nomads
Seasonal residents spending 60-90 days in Saint Martin: AT&T roaming at $10/day for 60 days = $600. For 90 days: $900. An unlimited eSIM at $2.36/day for 90 days: $212.40. At these durations, a local SIM card or a monthly local plan becomes the most cost-effective option. But compared to keeping AT&T or Verizon roaming active, an eSIM saves $667.80 over a 90-day stay.
Frequent traveler annual savings
Frequent travelers to Saint Martin (4 trips/year) face $400 in annual AT&T roaming charges. Four 20GB eSIMs total $74.56 for the same year. Annual savings: $325.44. All eight connections (4 AT&T, 4 eSIM) route through Orange's 5G towers.
Extended stay economics
A remote worker billing a client for Saint Martin connectivity: AT&T line item: $300/month. Coworking space WiFi in Saint Martin: $50-$150/month. eSIM on Orange: $51.60/month. The eSIM provides cellular backup when coworking WiFi drops during client calls. AT&T's Day Pass does the same but costs $248.40 more per month. Over a 3-month stay: AT&T totals $900, eSIM totals $154.80.
Frequent flyer savings
Most frequent travelers visit multiple countries, not just Saint Martin. If AT&T charges $10/day in every destination and the average trip is 10 days, 4 trips cost $400/year in roaming alone. At an average eSIM cost of $18.64 per trip, the annual total drops to $74.56. That $325.44/year buys a round-trip flight in many markets.
Data usage savings
A traveler using Google Maps 3 hours/day in Saint Martin consumes 24 MB/day in navigation data. Over 10 days: 240 MB (0.2 GB). AT&T charges $10/day regardless of how little data you use. An eSIM at $0.86/GB on Orange charges $0.21 for navigation alone. The eSIM's per-activity cost is a fraction of the per-day fee.
Couples trip savings
The lowest-cost option for couples in Saint Martin: one 20GB eSIM at $18.64, shared via hotspot. The second phone connects through the first phone's WiFi hotspot. Total cost: $18.64 for both devices over 10 days. Compare: AT&T charges $200 for two lines ($10/day each). Savings: $181.36. Trade-off: the second phone needs to stay within WiFi hotspot range of the first.
UK carrier comparison
UK travelers face lower daily roaming rates than US travelers: Vodafone GBP6/day vs AT&T $10/day in Saint Martin. But the eSIM still costs less than both. Vodafone 10-day total: GBP60. AT&T 10-day total: $100. eSIM: $18.64. The eSIM wins regardless of which home country the traveler comes from.
Our verdict
Bottom line for Saint Martin: the eSIM wins. $18.64 for 20GB on Orange vs $100 on AT&T for 10 days. Same towers, same speeds, 81% lower cost. No daily triggers, no per-MB billing, no bill surprises from background app syncs.
How much can I save with eSIM in Saint Martin?
eSIM savings in Saint Martin scale with trip length. A 7-day trip saves $51.36 vs AT&T ($70 roaming vs $18.64 eSIM). A 14-day trip saves $121.36 ($140 vs $18.64). Both connect to Orange's network. Rates verified May 2026.
How much does roaming cost in Saint Martin?
US carriers charge $10/day for Saint Martin roaming. UK carriers charge approximately GBP6/day. A 10-day trip costs $100 on AT&T or Verizon. A travel eSIM on Orange costs $18.64 for 20GB. Verified May 2026.
Saint Martin network context
Local networks
Saint Martin has 1 mobile network. The primary carriers are Orange, Dauphin Telecom.
Connectivity notes
- Shared island — French side uses Orange, Dutch side uses different carriers
Good to know
In Saint Martin, dial 15/17/18/112 for emergency services. Calling 112 may not connect on all networks. This number works on any active SIM or eSIM, including plans with exhausted data balances.
Good to know
WiFi in Saint Martin is moderate. An eSIM ensures you stay connected between resorts and ferry terminals at $0.86/GB.
Frequently asked questions
- How much does AT&T roaming cost for 10 days in Saint Martin?
- AT&T International Day Pass charges $10/day in Saint Martin. A 10-day trip costs $100 in roaming charges. This activates automatically when your phone connects to a local network abroad.
- Is a travel eSIM cheaper than Verizon TravelPass in Saint Martin?
- Verizon TravelPass charges $10/day in Saint Martin. A 10-day trip costs $100. A 20GB eSIM covers the same trip for $18.64 on the same local network — saving you 81%.
- How much data do I need for a week in Saint Martin?
- Most travelers use 1-2 GB per day for maps, messaging, social media, and light browsing. A 7-day trip needs 7-14 GB. Video calls and streaming push usage to 3+ GB per day. Choose a 10GB or 20GB plan for heavy use.
- Can a family share one eSIM in Saint Martin?
- One eSIM stays in one phone, but most eSIM plans allow tethering (personal hotspot). A family of 4 can share a single 10-20GB eSIM through one phone's hotspot instead of paying $10/day per person for carrier roaming.
- Does T-Mobile free data work in Saint Martin?
- T-Mobile Magenta includes free data in Saint Martin, but speed is capped at 256 Kbps. That is too slow for Google Maps, video calls, or uploading photos. The high-speed add-on costs $15/day.
- How much does a 30-day eSIM cost for Saint Martin?
- A 30-day eSIM for Saint Martin depends on data volume. Metered plans (5-20GB) typically range from $8 to $35. Unlimited daily plans run $1-2/day. Both connect to the same local network as carrier roaming at a fraction of the cost.
- How much does carrier roaming cost in Saint Martin?
- T-Mobile includes Saint Martin 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 Orange at $1.14 for 1GB provides full 5G — 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 Saint Martin?
- No. T-Mobile caps free international data at 256 Kbps in Saint Martin — 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 Saint Martin costs $15/day. A travel eSIM on Orange's 5G network delivers full local speeds at $0.86/GB — cheaper per GB than the speed upgrade.
- How is my roaming bill calculated in Saint Martin?
- 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 Saint Martin — 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 $1.14 upfront, with no per-day activations and no per-MB overages. Once purchased, the cost is fixed regardless of usage patterns.
- Does my phone need to be unlocked to use a travel eSIM in Saint Martin?
- In most cases, no. eSIM profiles install alongside your existing carrier SIM without requiring an unlock. iPhones purchased in the US after 2020 support dual SIM and eSIM regardless of carrier lock status. Android phones vary — most support eSIM without unlocking, but some budget models require unlocking before a second carrier profile can be installed. US carriers are required to unlock devices after contract fulfillment: AT&T unlocks after 60 days, Verizon after 60 days, T-Mobile after 40 days. If your phone is under contract or recently purchased, check your carrier's unlock policy before your trip to Saint Martin. Rates checked June 2026.
- How do I track data usage on my travel eSIM in Saint Martin?
- Three methods for monitoring eSIM data in Saint Martin. First: your eSIM provider's app shows real-time usage against the plan purchased at $0.86/GB. Second: iPhone Settings > Cellular > [eSIM name] shows bytes sent and received — reset the counter when your plan activates. Third: Android Settings > Network > Data usage lets you set a data warning threshold. AT&T International Day Pass at $10/day does not break out per-day data usage by country in the MyAT&T app. The eSIM provider app on Orange's network is the most accurate real-time tracker. Rates checked June 2026.