SGH-I337M Network Problem
My cousin recently got a Galaxy S4 (SGH-I337M) and he got it unlocked from the dealer. A few days ago he took out the SIM ( The phone is telus & the SIM is rogers) & re-inserted it. After that, he couldn't call or text, but the signal strength in the top right was full. In the notification bar, there is a triangle with an exclamation mark & it says no service. In the mobile network settings, if we press register automatically, the exclamation mark goes away but it says unable to connect, try again later. Any help would be appreciated, thanks.