Registration / Login Issues
First of all, you need to make sure you are entering your cell phone number in the international format:
+(country code)(city or carrier code)(your number)
Let's say you live in the U.S.A. and your cell phone number is 555-123-4567, then you need to enter
Telegram no longer supports VoIP numbers (e.g. Google Voice) because SMS delivery to virtual numbers is not reliable. In case you registered an account using a virtual number, please send an email to email@example.com with the following details:
- Your international phone number
- The name of your number provider
The Telegram team will temporary enable your account again, so that you have the chance to change the number to a real sim card phone number.
In case you have a real sim card phone number and it's not a virtual number (VoIP), contact firstname.lastname@example.org and answer the following details:
- Which company did you get your SIM card from?
- What country are you in right now?
- Are you able to receive SMS? Please test it with your friends now. If no, you are not able to log in to Telegram.
Country specific SMS delivery issues
Brazil: Oi, formerly known as Telemar, is the largest telecommunications company in Brazil and South America. They offer their customers a website where they can configure, e.g. blocking SMS from short numbers. It's important to disable the setting, in case you do not get any verification / login SMS. Login to http://minha.oi.com.br and disable Recepção de Sons Imagens e Bate papo.