I actually despise it. I'm not sure if this has changed, but after being forced to make an account under my phone number, it proceeded to send a message that I had joined to everyone who had my number in their contacts and was foolish enough to share them with Telegram. This included a rather vile woman whose number I apparently inherited from a deceased relative some years before. She didn't understand this and accused me of stealing his identity. While it was simple enough for me to brush it off, I couldn't believe they would allow and even encourage such a thing, so I almost immediately deleted my account and instead tried out one that wasn't so eager to lap up my personal details.