# Phone Number Injections {{#include ../banners/hacktricks-training.md}} It's possible to **add strings at the end the phone number** that could be used to exploit common injections (XSS, SQLi, SSRF...) or even to bypass protections:
https://www.youtube.com/watch?app=desktop\&v=4ZsTKvfP1g0
https://www.youtube.com/watch?app=desktop\&v=4ZsTKvfP1g0
**OTP Bypass / Bruteforce** would work like this:
https://www.youtube.com/watch?app=desktop\&v=4ZsTKvfP1g0
## References - [https://www.youtube.com/watch?app=desktop\&v=4ZsTKvfP1g0](https://www.youtube.com/watch?app=desktop&v=4ZsTKvfP1g0) {{#include ../banners/hacktricks-training.md}}