Why can I send and receive texts but not make calls or go on the internet?
Last year I got a unlocked Samsung Galaxy note 9 and set it up with at&t prepaid. I could text on it (though occasionally wouldn't receive a message) but I couldn't make calls or go on the internet at all, but the wifi worked. I had it on the unlimited plan of talk, text, and data. Does anyone have any idea why it didn't work except for texts and how I can fix it? Do I need a new sim card?
I would like to get it set up instead of buying a new phone again.