Xperia zl c6506 - reboots in t-mobile lte network

[nvr4d]

hi guys.
I've bought my phone in Jan 14. Not long ago bought t-mobile Sim card and started using their lte network. What I noticed, phone reboots sometimes when on lte network and mobile data is active. This doesn't happen if I restrict it to wcdma or turn mobile data off. On t-mobile support forum there is a case with similar issue, but their support only suggests to contact Sony mobile.
I remember testing lte year ago, with stock rom and everything was wor working fine, without restarts.

Any help is appreciated.

[Thommo]

Not sure why this would only happen in LTE mode but try safemode and see what happens however in circumstances like this the Sim card is usually faulty

[nvr4d]

Hi Thommo,
Thanks for the response. I rebooted into safe mode and after 20 minutes in lte network it rebooted itself again. So there seems to be some incompatibility between the phone and the network.

[nvr4d]

Also what I noticed, reboots only occur when device screen is black. If I'm doing something to phone, or just navigating, it doesn't reboot.

[Thommo]

Have you tried a system repair to rule out firmware issues

[nvr4d]

No, haven't tried that yet.

For the moment, I just disabled LTE and phone seems to work just fine.

Will wait for Sony to release 5.0 firmware, if this doesn't help - will move back to ROM the phone was shipped with.

[Uliwooly]

What if you get a brand new SIM card? also follow thommo's advice and repair the phone

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355

[74nnnotomorrow · Accepted solution]

I had similar issues...this worked for me.

Under settings, go to wireless & networks > mobile networks > acess point names, selct t-mobile. Select APN protocol and change from IPv6 to IPv4.

Hope this works for you as well. .

[nvr4d]

Wow.

They use IPv6. I would never know that.

Thank you man, this really helped me. Phone is fully stable now.

A little follow-up: Also, phone stopped draining battery like crazy after changing APN IP version. More than half a day in LTE network (mostly standby, of course) and battery is still at 99%. Brilliant.