Originally Posted by Lebo
The AT&T Fusion is in fact a Huawei U8652, an off-spec version of the Huawei U8650 Sonic (Which has it's own home here on android forums). Specifications are the same between the two phones however there are two things to keep in mind.
Custom roms made for the U8650 work with the Fusion. Some of those roms will enable the phone's multi-touch (the stock rom does not have multi-touch) however it doesn't work well. So if you haven't given up on multi-touch yet I don't have good news. there are two points max and they WILL interfere with each other.
Which is probably why AT&T dropped the feature for it's rom.
The other thing to know is that update.app roms made for the U8650 will not work. I can modify these into the traditional .zip rom format and they will then work on the Fusion. If you need this done let me know.
Otherwise you have a U8650 Sonic and can visit us over on the Sonic's section of these forums where we would be glad to help you.
I'd like to add a note from my own experience/research:
U8650 does not have (at least on the roms I have flashed) the 850mhz band.
If you rely on this band you may have issues.
I had no reception when I went out of the city for a long weekend, not even 2G! Luckily for 98% of my time signal is fine since I am in main centres (2100mhz I think).
Now I'm off to see if I can get an AT&T fusion rom... I haven't found anything at all through searching U8652!
(Lesson learnt: always back up your factory rom...)