Connection problem & Invalid mmi code

[Ankitpatidar45]

Dear Sir,

    i have an sony xperia arc , and i have some problem of connection problem & Invalid MMI code how to fix it.

[Johan]

I suggest that you try using another SIM card in the phone. If the problem still remains you should try to run a software reinstall using SUS.

http://www.sonymobile.com/gb/tools/update-service/

[kenneth2222]

Im using using Xperia Z1 compact and I got the same problem, please help me too

[kenneth2222]

How to reinstall software? Ive already been reset my phone few times but still same problem