SimSmsBox Quick answer: When GitHub phone verification fails or rejects your number, rent an overseas real-SIM number on SimSmsBox, request SMS (not a call), and poll the code. Keep country near your IP; skip free public pools.
GitHub may require SMS when creating an account, enabling 2FA, or unlocking suspicious sign-in — virtual numbers fail often. Here’s the receive-SMS path.
Why it fails
- Virtual / VOIP ranges blocked;
- Burned free-pool numbers;
- Number country far from your IP;
- Waiting on a voice call while rented numbers only get SMS.
Verify with SimSmsBox
Basics: how to use an SMS platform.
1. Reach the phone step first
Finish email/profile fields before buying a number.
2. Country + real SIM
Prefer physical — real SIM vs virtual.
3. Purchase
curl -X POST https://api.simsmsbox.com/api/sms/orders/purchase \
-H "X-API-Key: psk_xxx" -H "Content-Type: application/json" \
-d '{"service":"github","country":"US","cardKind":"physical","rentDays":30}'4. SMS only
Send via text, not voice.
5. Poll
curl https://api.simsmsbox.com/api/sms/orders/91 -H "X-API-Key: psk_xxx"Tips
| Item | Tip |
|---|---|
| Country | Near your IP |
| Line | physical |
| Channel | SMS only |
| Cost | Free pools rarely work — paid SMS platforms |
FAQ
Q: Number always invalid?
Reorder with another real SIM / country; confirm shop stock.
Q: Need the code again later?
Usually yes within the rent window; move long-term recovery to a number you own.
Takeaway
Stuck on GitHub phone verification? Use a clean overseas real-SIM SMS number — nearby country, SMS only, poll the code. Platform comparison: SMS platform vs 5sim.