Default [Q] Alcatel One Touch Evolve 5020N no incoming calls.

Hello all...!
This is my first post here, just trying to solve this:

Well, I got my Alcatel One Touch Evolve 5020N (MetroPCS) second hand. Everything was working just fine, until 2 days ago. I can use my data, make calls, send and receive sms, but not receive incoming calls. I can see the call as "received" and not as missed, also, if I try to call my number from another phone, it rings once then sends me to my voicemail, a new incoming call is added to the phone calls list, but can't receive it.

I made a factory reset and didn't help. I'm really confused about this. Please help.

Thanks in advance.