My phone (Sony Experia E5) turns off randomly

[Jack2911]

I have a Sony Experia E5 for about month and since yesterday it started to turn itself off randomly. I tried many diffrent ways to fix it : boot without sim and sd, turning airplane mode,stamina etc. but nothing helps. It turns itself off as soon as I lock my phone (not allways on first time but on third time locking it allways does that) and screen stays black for a minute and then it turns itself on again with standard SONY white screen. If I let the phone to stay on and dont touch anything after 3-5 minutes phone just does the same thing (practicly reseting itself)
I would like a help asap because it is really annoying( I cant even charge it because it keeps turning off and on by itself) and it cant really operate normally.
PS. Sorry for my english it is not my first language

[MarlonUk1]

does this happen when you are on safe mode?

try to charge your battery full by turning it off and using the wallmount adpater.

then perform software repair using Xperia Companion

[Jack2911]

I will try it amd update you on results

[RobertoIcardi]

Same here, starting from yesterday evening; today is worst, as the phone is continuously and randomly locking itself, stay locked, and then reset. Sometimes does reset even doing anything. Very annoying, as the phone has one week of life....

UPDATE: problem seems related with wifi, if I disable the wifi phone is more stable (so far)..... has to be sent to assistance???