Hi, I have recently received an A52. However after inserting my sim card, I found I was able to send and receive texts just fine, and my mobile data worked as well, but I could not send or receive calls (it immediately hangs up before a connection is made.) After checking around I had seen to check the call forwarding and got the message "Failed to read data, Check your sim card or network connection and try again." I have no idea why it would be working for texts and data but not for calls. I can Provide additional information if necessary, I just don't even know where to start.