Xperia C5 Ultra suddendly restart after no evident cause. No heating, No app running, no gaming or video playing/recording. It's not on a constant frecuency. It could be one or two days or even a week before it begin restarting several times. I've already tried restoring the phone, update it and nothing works. It's a black version. My brother have exactly the same phone in white, we bought both the same day and he has no problems.Thanks!!
Most of the time, the issue you have described can be caused by third party apps or a faulty SD card.
Because the issue is intermittent it is going to be difficult to test. Generally I would recommend you test the phone in safe mode, and then without an SD card.
thanks for answering that soon. I'll try using it with no SD first for a few days and see what happens. I'm not gonna choose this as a valid answer yet. thanks again.
i bought a c5 dual ultra yesterday, i updated it and suddenly when opening some apps or playing games it will hangs up and then it will restart and its always happening.. Please help me with these =(
Rjaymendoza if you updated from 5.0 to 5.1 directly may need to do a software repair via Sony XC app. It's easy to use however do a backup of your data before doing so.
I also have the same problem my c5 today it hanged up then restarted itself trice.. I am not playing any games no apps running. No music. And also the top speaker is not working since i bought this i just found out later that its not actually working and also mh battery drains too fast maybe 3hrs of straight use with internet. Please help me. I love this phone so far. I bought this last aug.16,2016
I had this problem and I figured out the SIM card does not seat properly in carrier. I know this sounds strange, but for me it was happening several times a day.
I placed a small piece of sticky tape behind the SIM card and "hazar", problem sorted, it has not reoccured in 3 months + now.
