Im using Signal v7.15 on an OGSE with ios 15.8.2 Was trying to change my phone number but I keep having problems in receiving the OTP. Error message says there is an external failure but does not explain why. Possible solution to this? TIA
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OGSE?
What country code is your phone number in? Are you trying to register from the same country?
Are you using a VPN?
1st-gen iPhone SE, maybe?
I would say turn off the VPN to change the number and then put it back on
