Does Messenger Telegram periodically add unknown people to your contact list? There is a reason for this ! Think about it, have you ever inserted your SIM card into someone else’s smartphone? Or maybe you’ve already signed in with your Google Account on someone else’s device? The appearance of random people in your contacts is a consequence of these actions. The thing is, the messenger automatically remembers contacts from other people’s devices and adds people you don’t know, who just started using Telegram, to your smartphone chats.