I would like to know if this is possible. I have a Lumia 640, sim free unlocked. I recently moved to the UK Operator EE, EE firmware on the 640 has wifi calling. Would it be possible to flash my 640 with this firmware?
1. Shouldn't be an issue as the cv version works fine on EE. LTE is more a hardware thing.
Let is know what the EE fw is like, I may consider it as NFC payment had to use the EE fw too.
Ok I got it installed. And am disappointed, why? No Wifi calling option, it is simply not there.
I'm so pleased this might be possible!
In that link the dude is changing his country variant code. Do we know what to change and what to, to make it download the EE specific firmware?