Why don't I have signal on my Huawei Y300 and I have a WIFI Authentication Problem and SIM Card question mark icon?

[AC Question]

Huawei Y300 No Signal, WIFI Authentication Problem and SIM Card question mark icon

I just got my phone wiped and fixed, and the SD card seems to be working, but there is a question mark icon inside of a SD card on the top of my phone, and there is no signal. The signal triangle thing is completely empty and black. I am also having authentication problem on the wifi, but this might be something different. Please help me solve these issues.

 

[B. Diddy]

Re: Huawei Y300 No Signal, WIFI Authentication Problem and SIM Card question mark icon

Welcome to Android Central! The question mark in a SIM card icon means there's a problem with the SIM. You may need a replacement SIM card from your carrier.