Get a faster Internet connection.
get a new phone
Find your nearest Sony distributer, take phone to them, if they cannot fix it for you then they should be able to talk you through what you can do
If the scratches are bad, there are special services that would be happy to fix your phone. I think they replace the part that is scratched.
The missing visual display is either a problem with the phone's monitor or a connection problem. you will need to call the phone company and ask them about repair options for the phone.
your phone is not getting a complete connection, could be one cause, just a simple pwr cycle ( turning the phone off) can give you a fresh registratoin, can improve the quality of the call.
Because of your internet connection
In my experience most problems are either a bad ground connection, or a short circuit somewhere. Shorting will probably be due to a chaffed wire, or loose connection.
A bad ESN means the phone is linked to a past due account or has been reported lost or stolen with a wireless carrier. Without a good or clean ESN, the phone cannot be activated.
You can't "fix the connection to Minecraft" it's all on your current holder, and bandwidth.
The radiation from the sun that is blocked by the upper atmosphere can cause radio disturbances which in turn can cause cell phone interference.
some of it is either wii or cods fault but get a better router and iternet host.