I am Not recieving sms code by verification on my Nokia 8110 with KaiOS when I try to login to Telegram. It had happen many times before. This little and simple OS is like a toy and I do not know if the security level is the best. But is possible to receive a validation on mail instead or other way around as I can not contribute to the chatroom otherwise then.
Regain your privacy! Adopt /e/ the unGoogled mobile OS and online services