Does TSB Block VoIP Numbers?
If you're trying to verify a TSB account and aren't receiving the SMS code, it's likely because you are using a virtual number.
TSB queries the telecom database (HLR Lookup) to identify the carrier associated with your phone number. If it returns as a "Non-Fixed VoIP" or "Virtual" number, the SMS gateway deliberately fails to send the text message to prevent fraud and spam. Often Flagged.
How to bypass TSB VoIP blocks?
Trying to find a "VoIP bypass" for TSB is a common mistake. Verification systems provided by companies like Twilio or Vonage are extremely efficient at detecting virtual numbers. The block is enforced at the network level, not the app level.
To successfully receive a verification code for TSB, you need a number that is issued by a genuine Mobile Network Operator (MNO).
The SecondSIM Solution
SecondSIM provides you with an instant eSIM that operates on the UK's O2 and Three networks. Because these are standard consumer phone lines, TSB cannot block them. They register perfectly during sign-up.
- Not VoIP - Genuine Mobile Network Codes (MNC)
- Guaranteed SMS delivery from all shortcodes
- No hardware required - activates via eSIM in minutes