navigation bar problems after marshmallow update

[ahmeds16]

After i update new software in my xperia C4 dual to  marshmallow update  ,

the navigation bar (3 key back , home and recent app) doesn't work correctly
sometimes working normal , and sometime not work or responding after late time or one of those  key work and other two not work

and if i use whatsapp or messenger or ant thing useing keyborad , when i typing any thing phone click back from it self or click home i will be crazy as soon

i try solve in pc companion but not solved

.. this problem i see on friends mobiles sony too like c5 z3 and my c4
please fix this problems quickly
i will broke this phone as soon and i will not buy any thing from sony again

[Jonas]

Hi @ahmeds16, I'm sorry to hear about your phone.

Was it directly after the software update that you started to experience this behaviour?

How often would you say that the back, home, and task keys aren't working when you press them? Is it a few times per day or a few times per week?

When you performed the software repair using PC Companion, did you restore a backup afterwards? If you did, I'd recommend performing a software repair using Xperia Companion and that you don't restore the backup directly, instead try using the phone for a bit and see if the same thing occurs.

Let me know how it goes!

[Paul1092]

Hello. Jonas I try it trice but nothing works it has really a screen problem after the marshmallow update pls help us we are sony lover and we want to work and use our phone smoothly. Pls pls pls. thank you!

[Jonas]

Hello again!

I'm sorry to hear that you still experience this behaviour.

Since you have already performed the software repair twice without restoring any backup I'd recommend that you get in touch with your Local support in order to get assisted with having your device sent to an authorized service centre.

If you have any questions regarding warranty, service routines and so forth your local support team are the experts on your market and they will be able to answer any and all your questions regarding this.

I'm sorry for any inconvenience this may cause and please let me know if there is anything else I can assist you with!