Flashing LG G4 H815(International Version) rom onto LG G4 H812 (Bell Canada) hardware I am going on a long trip to the UK and Middle East, and want to take my LG G4 with me and use foreign service providers. I am planning on flashing the H815T (Similar to H815 International Version but supports more bands) KDZ file onto my existing LG H812 (Bell Canada) hardware, so I can have support for those frequency bands in the UK and Middle East. 

According to my understanding, the H815T rom is compatible with the H812 hardware, as both the Bell Canada and International Versions have the same underlying hardware, but I would gladly appreciate if someone can confirm this. I have attached the phone details below.

Thanks and all the best!
one thought and I don't know for sure but it's ok if the ROMs say they support those freqs but does the internal antenna support those freqs as well  being that it's a T-Mobile phone