IPhone 4s 6.1.3 problems with 3g,In and Outgoing Calls

Hi Everybody!
I got a factory unlocked (originally was Vodafon locked) iPhone 4s with firmware 6.1.3.When I insert my sim (Hungarian Telenor) when only EDGE is on it founds the signal and seems like everything is working.After a few hours or sometimes even a day passes by a phone stays on full signal with Carrier logo and Edge on, but my friends reporting that they cant call me(like im offline) and i cant make calls either.The interresting stuff is that the Edge connection is fully working during that im offline for my friends via Calls and i can send and recieve imessages and viber messages.
When i switch 3g on it disconnects from service drops the EDGE and never finds the way back and stays 'searching' or 'no service' at all..
I thought that its my Carrier's fault so i went to spoke with them and tried 5different micro Sims( cause i wrote that 4s-s are sensitive to SIM card types).. this thing not worked either,
Then i tried the phone with a T-mobile SIM card.. it does the same..connects to the services,but with 3g switched on not finding service..so totally like with my sim.
Here Comes the bumm... i Tried the phone with vodafone sim and everything works.. simple connectivity to 3g with full internet usage,can make and recieve calls...I spoked with all of the Carriers and also Apple and no body can give me nothing..the phone is off varranty so changed to a new one isnt an option..
Anybody? Something? im beginning to give up .. please help if you can..Thanks!!
ps.:i restored over 20times,reset network settings,switch off and on automatic setting time.. every little possible things that people wrote on forums before..

neverstop wrote:
1. Settings > General > About - Carrier sais Carrier 14.0 when i restore and startup with my Telenor sim.. ..
1. In order
2. ...... everyone is pointing on the other and i cant do anything about it..just the whole 3g/call failed stuff is bothering me...
2. It appears configuration issue. I use three iPhones (in my family) on four unsupported carriers. Never had any problem except on one. Outgoing calles to one particular party failed. Set right by Carrier.
3. Is there something like the Unlock process was not fully succesfull...
3. Never heard. It is digital : Yes or No. In the instant case, unlock is successful.
Download firmware afresh via iTunes or from here iPhone4,1_6.1.3_10B329_Restore.ipsw
and save. Insert Telenor SIM in the iPhone. Backup. Option+Restore (Mac) Shift+Restore (PC) pointing to saved firmware. Reject Carrier updates, if any offered by iTunes. Setup as New.
Observe.

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