Issues Registering with a Nigeria IP Address or Mobile Number or Receiving SMS

• I have searched open and closed issues for duplicates
• I am submitting a bug report for existing functionality that does not work as intended
• I have read https://github.com/signalapp/Signal-Android/wiki/Submitting-useful-bug-reports
• This isn't a feature request or a discussion topic

Bug description

I can't register on Signal with a Nigerian mobile number which starts with +234.
I use Signal only and lately it has been hard having people in my country Nigeria to register on Signal, it's like Signal server is either blocking Nigeria IP addresses or mobile number even with a VPN.

Steps to reproduce

• Download Signal from Play Store or official website
• Grant all permissions requested when initializing registration
• Try to register with a Nigeria mobile number or IP address
• Get stuck in endless captcha or whatever.
• Or pass the captchat but can't receive SMS verification code.

Actual result: Endless captcha solving.
Expected result: That I am able to use Signal with my registered mobile number.

Screenshots

Device info

Device: Tecno KC8
Android version: 14.0.0
Signal version: 7.28.4

Link to debug log

https://debuglogs.org/android/7.28.4-JW/5bf954fad9cdc884d637e86e31385fb6af48f9d4039c188258c6cae8697af70d

Start with the reported registration flow and the linked debug log for Signal 7.28.4 on Android 14, checking the +234 number and Nigeria IP behavior around captcha and SMS verification. Compare the observed failures with successful registration cases; done means a Nigerian number can complete captcha and receive the SMS verification code.