Calling not always working need to restart to work

[Boubou1]

When trying to call it says calling but doesn't actually call it holds on the calling screen. Then trying to end the call it jds and just says ending but it doesn't end. I can access other apps at this time but to stop the calling/ending process I need to restart the phone. It will then work for a few times then it will do it again. I have changed the sim, done a software repair via Sony compatible on the PC, it's been sent in for repair. I'm now at the end of my tether with it all. I have a brand new handset and its still happening. Anyone any ideas what else this could be? (p.s I'm on my 4th handset in 3 weeks). 

[JackXperiaP1]

May be U have an corrupted sd card or a SIM card .. jus give a try with new SIM card and try to do a fresh installation .. 

1. Reset the mobile aft backing up all from internal storage 

2. Now update it and try 

3. Try with new SIM card too 

[Boubou1]

Thank you for your reply I got a new sim and I did a fresh reinstallment over the weekend. But not tried my sd card I will take it out and maybe it could be this. Hopefully!?.