Going back to 5.1.1 from 6.0 on Xperia Z5

[Betamax_man]

I wonder if anyone could send me Lollipop 5.1.1 for the Sony Xperia Z5 (Vodafone UK version) as my phone updated to Marshmallow 6.0. With Marshmallow, two apps that I use no longer work and there won't be a fix for them either. I have managed to back date the phone to an EE version of Lollipop as this was the only version I could find but VoLTE no longer works.

Thanks in advance, John.

[BandOfBrothers]

Hi,

I understand what your attempting to do but I'm not sure you can be fully helped here via what your asking. 

There are dedicated other forums available in regards to what your asking. 

It sounds like your aware of what your doing but please do be careful. 

VoLTE is not available on Vodafone Uk (yet)

[B-12345]

Have you used VoLTE on Vodafone?

[Betamax_man]

Hi, I was sure I was, but now bandofbrothers has made me doubt it. When I made a call before using EE's firmware, I noticed the 4g symbol was sill in the notification area during the call, now it changes from 4g.

[B-12345]

Many people are now seeing a VoLTE symbol on their phones it isn't working yet! very strange