I have the international s2 ext battery & door, it doesn't fit my AT&T GS2. I ordered the back replacement housing & door that fits the international & AT&T GS2. I'm going to install the international housing on my AT&T phone and then I'll be able to use my international ext battery kit and everything will fit perfectly.
The back housing is only 14 bucks on ebay. I have the battery in my phone held in by my case and what a huge difference. I have SHOSTOCK2 v6.0, slightly overclocked. Runs fantastic and very fast.
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