Z5 unstable since Marshmallow

[JnMx]

My Z5 has been regularly crashing then slowly rebooting, sometimes a couple of times daily, since the marshmallow update. I recently did a full software repair and reset using pc companion and all was ok for a day or two, and then it started happening again, only now it takes up to ten minutes to actually power up. I've never so much as dropped my phone and it should be in immaculate working order so this is incredibly frustrating for me. I've had Sony phones for years and never had a problem until the Z5, and I was hoping it would be as fantastic a phone, if not better, than my old beloved Z2. What more can I do apart from taking it back to the O2 shop?

[arianit]

I have the same problem. I am TOTALLY dissapointed with the Z5. I don't know what to do. Is SONY a serious company ?

[Uliwooly]

@JnMx @arianit

This seems to be a hardware issue, things to check, remove the SIM and SD cards and see if you experience a reboot. 

[arianit]

@uliwooly

I don't think it's a hardware issue, because it all started whan I've updated to Marschmallow. I think it's crashing with that BATTERY OPTIMISATION thing. They wanted to do something better with the BATTERY OPTIMISATION but they have done a DISASTER to my battery.   I go to sleep at 12 pm and the battery is 100%, when I wake up in 8 am (after 8 hours) battery has gone to 40%!! Terrible. And I've paid 600 euros for that phone.  I hope SONY company for which I have so much respect will correct this BIG FAILURE.

[RyTek]

@arianit Then it must be hardware related. I leave my phone for 10 hours in night time, with WiFi actived, 3 mails sync, ~10 apps push notification (data tranfer a lot) but just drain 10% max (regular is 6%).

[JnMx]

Maybe it is, maybe it isn't a hardware issue. I only know my phone was running swimmingly until the marshmallow update. It's blighted.

[arianit]

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@JnMx  you are right! When I removed the sim card the phone started to work perfectly. But now I don't know where's the problem. Is it an antenna problem, software or what ??  Do you have any idea, cuz I don't need the phone without sim card ?   Thank you for your advices

[Uliwooly]

@arianit

Get a brand new SIM card and report back

[arianit]

@JnMx I Bought a brand new SIM card and the phone now is OK. I charged 100% last night and a woke up in the morning (after 8 hours) it was still 100%. Till now is working perfectly. Thank you very much. I appreciate your help.

[Uliwooly]

@arianit

Excellent