A major benefit of using a foreign SIM for roaming in China is that your data is typically routed through your home country, which usually bypasses the "Great Firewall," allowing you to access apps like Google, Instagram, and WhatsApp without a VPN.
Major Operator Roaming Fees (2026)
| Operator | Country | Primary Roaming Plan | Fee (Approx.) | Data/Details |
|---|---|---|---|---|
| AT&T | USA | International Day Pass | $12 /day | Unlimited data (uses your home plan allowance). |
| Verizon | USA | TravelPass | $12 /day | Unlimited data (high-speed caps may apply). |
| T-Mobile | USA | International Pass | $5–$50 | $5 (1 day/512MB); $35 (10 days/5GB); $50 (30 days/15GB). |
| Singtel | Singapore | ReadyRoam / UnlimitedRoam | $18–$35 | ReadyRoam: $18 (6GB/30 days); UnlimitedRoam: $35 (15GB high-speed/14 days). |
| Vodafone | UK | Roaming Pass (Zone D) | £7.86 /day | Daily fee to use your home plan allowance in China. |
| EE | UK | Roam Abroad Pass | £5 /day | Allows you to use your UK allowance; weekly options often available for ~£25. |
| Telstra | Australia | International Day Pass | $10 /day | 2GB high-speed data per day + unlimited calls/SMS. |
| Rogers | Canada | Roam Like Home | $15 /day | Use your home plan data (capped at 20 days per bill). |
Important Notes for Travelers
- Pay-As-You-Go Warning: If you do not activate a specific roaming plan, "pay-as-you-go" rates are exorbitant, often ranging from $2.00 to $10.00 per megabyte. A single Instagram scroll could cost hundreds of dollars.
- Activation: Most US and Australian carriers activate the daily charge automatically the moment you send a text or use data in China. Others require you to "opt-in" via SMS or their app before departure.
- 5G Support: While most major operators have 5G roaming agreements with Chinese carriers (like China Unicom), your speed may be throttled to 4G or even 3G if you exceed a daily "fair usage" limit (typically 500MB–2GB).
- Network Selection: If your signal is poor, try manually selecting China Unicom in your phone's network settings, as it usually offers the best compatibility for foreign devices.