I have a Galaxy Note 2 -N7105 , Unlocked version, and it has been working perfectly with any sim card.
Some days ago, it suddenly show No signal at the signal bar , but the 4G mobile data works perfectly. I cannot make calls, but I can use internet 4G, and also Wifi.
I rooted it hoping it will be fixed, but nothing happened, same situation. I read in forums regarding different repairing techniques. I tried to select WCDMA in netwok mode also, nothing happened. I tried to install Ariza Patch, but it does not work for N7105.
Can anyone help me please!!!!