My Xperia E1 keeps restarting when hangs up.

[Kuldeep_singh]

Respected Sir/Mam as I brought Xperia E1, But I think I have made a wrong choice , It restart again and again after it gets hanged up.

[_alexdon_]

Do you have a proper mini SIM?

[hamed64202]

I have same problem :((
What should I do
I bought this phone 2 days ago and update with latest firmware.