Three UK Roaming in Mexico: Rates, Hidden Fees, and Alternatives (2026)
Updated May 2026 · By The Roaming Cost Desk
Short Answer:
Three UK charges £2.75/day for roaming in Mexico. A 7-day trip costs £19.25 in Three UK fees. A travel eSIM covers that same week for $3.49. You save $15.76 with HelloRoam. No contract changes needed.
Three UK Mexico roaming rates
All Three UK plans available for Mexico.
| Carrier | Daily | 7-day | 14-day | Data | Verdict |
|---|---|---|---|---|---|
Go Roam (new customers) £2.75/day EU from December 2025. £5–£8/day worldwide depending on join date. | £2.75 | £19.25 | £38.50 | 12GB cap | No longer free |
Go Roam (new customers) Details
Go Roam (new customers) costs £2.75/day in Mexico. Data is 12GB cap at 4G speed. £2.75/day EU from December 2025. £5–£8/day worldwide depending on join date.. Three ended free roaming for new customers in October 2021. Dec 2025: EU rate raised to £2.75/day. Oct 2021–Dec 2025 customers: £2/day EU. Pre-Oct 2021 customers: still free under legacy Go Roam terms.
What's included with Three UK in Mexico
Data, voice, and SMS details.
Data Allowance and Speed
12GB cap at 4G speed on Telcel, AT&T Mexico. £2.75/day EU from December 2025. £5–£8/day worldwide depending on join date.. Local networks in Mexico average 65 Mbps.
Voice and SMS Rates
Three UK includes voice and SMS in the daily roaming charge. The £2.75/day rate covers data, voice, and texts. Additional per-minute or per-message fees do not apply within the covered plan.
Hidden charges for Three UK in Mexico
Three Go Roam in Mexico: GBP2.75/day
Three charges GBP2.75/day via Go Roam in Mexico. 12GB daily cap. Legacy customers (pre-Oct 2021) may roam free.
Three Go Roam pricing in Mexico
Mexico is in Three's 71-country Go Roam coverage list. Current customers pay GBP2.75/day with a 12GB daily data cap. A 7-day trip costs GBP19.25. Three raised EU rates from GBP2.00/day to GBP2.75/day in December 2025. Customers who signed contracts between October 2021 and December 2025 may be on the older GBP2.00/day rate. Check your plan terms.
Three legacy free roaming in Mexico
Three UK customers who signed contracts before October 2021 may still have free Go Roam included in their plan. Three's original Go Roam proposition was a key differentiator: free roaming in 71 countries with no daily charge. After October 2021, Three ended free roaming for new customers. Legacy free roaming is subject to a 12GB monthly fair use cap. If you joined Three before October 2021, check your plan documents to confirm free Go Roam eligibility.
Three 12GB daily cap in Mexico
Three caps roaming data at 12GB per day in Mexico. After 12GB, data is suspended until the next calendar day. This cap applies to both paid and legacy free Go Roam customers. Heavy data users who stream video, tether devices, or upload large files will hit the cap. At 1-3GB per day of normal travel usage (maps, messaging, social media), the 12GB cap is rarely a concern.
Three UK vs travel eSIM for Mexico
A 7-day trip costs GBP19.25 on Three Go Roam versus $3.49 for a travel eSIM. The eSIM has no daily data cap beyond the total plan allowance, runs on Telcel and AT&T Mexico at full LTE speed, and does not count against any domestic fair use policy. For Three customers on legacy free Go Roam, the carrier option costs nothing but is subject to the 12GB daily cap. For paid Go Roam customers, the eSIM is cheaper and faster.
Does Three UK work in Mexico?
Yes. Three UK works in Mexico and charges £2.75/day for roaming through the Go Roam (new customers).
Three UK works in Mexico at £2.75/day. You get 12GB cap at 4G speeds. Your phone connects through Telcel, AT&T Mexico, Movistar MX networks. Mexico has urban-only 5G coverage. A 7-day trip costs £19.25 in roaming fees. A travel eSIM costs a fraction of that.
Three UK covers Mexico at £2.75/day. Mexico has urban-only 5G coverage.
How much does Three UK charge in Mexico?
Three UK charges £2.75/day in Mexico. Moderate for short trips, but a travel eSIM still saves money on trips over 3 days.
| Trip | Three UK | eSIM | Savings |
|---|---|---|---|
| 3-day trip | £8.25 | $3.49 | $4.76 |
| 7-day trip | £19.25 | $3.49 | $15.76 |
| 14-day trip | £38.50 | $3.49 | $35.01 |
| 30-day trip | £82.50 | $3.49 | $79.01 |
A HelloRoam eSIM for Mexico starts at $3.49 for the entire trip, with 1GB at local network speeds. No daily fees, no hidden charges, no contract.
eSIM alternative for Mexico
Same networks, fraction of the cost.
Why an eSIM beats Three UK roaming
A travel eSIM connects to Telcel, AT&T Mexico at full LTE speed for $3.49 total.Three UK charges £2.75 per day for the same networks. The eSIM has no daily charges, no auto-enrollment, and no hidden fees.
- ✓204+ carrier networks worldwide
- ✓180-day refund policy
- ✓Instant QR install
- ✓Instant QR install
- ✓5G where available
- ✓Keep your home number
- ✓Instant QR install
- ✓5G where available
- ✓Keep your home number
Setup Guide: eSIM Alongside Three UK
- 1Put your phone in airplane mode before takeoff.Prevents Three UK auto-enrollment in roaming passes.
- 2Buy a travel eSIM for Mexico.HelloRoam, Airalo, and Saily sell Mexico plans from $3.49.
- 3Install the eSIM via QR code.Label it "Mexico data." Keep your Three UK line for SMS.
- 4Switch data to the eSIM after landing.Disable Three UK data roaming. Enable eSIM for data only.
- 5Switch back when you return home.Return to Three UK for data. The eSIM stays for next time.
Cost comparison: Three UK vs eSIM in Mexico
Savings across different trip lengths.
| Trip Length | Three UK Cost | eSIM Cost | You Save |
|---|---|---|---|
| 3 days | £8.25 | $3.49 | $4.76 |
| 7 days | £19.25 | $3.49 | $15.76 |
| 14 days | £38.50 | $3.49 | $35.01 |
| 30 days | £82.50 | $3.49 | $79.01 |
Mexico network and coverage context
Local Networks
Three UK roaming connects to Telcel, AT&T Mexico in Mexico. Average download speed is 65 Mbps. A travel eSIM connects to the same networks at the same speeds for a fraction of the cost.
5G Availability
5G coverage in Mexico is urban-only. AT&T Mexico launched 5G in Mexico City and major cities; Telcel expanding Both carrier roaming and travel eSIMs can access 5G where available, depending on your device.
Connectivity Quirks
T-Mobile US includes free unlimited data in Mexico — check if your US plan covers it before buying a SIM
OXXO convenience stores (like 7-Eleven) sell Telcel recharges at every corner
Mexico City has 21,500+ free WiFi hotspots — the most of any city in the world
Telcel dominates with 60%+ market share and widest coverage; AT&T is second
Many restaurants and cafes in tourist areas have WiFi passwords posted on tables or receipts