I have purchased a Samsung Galaxy S2 from UK. It was a used one. Now when I want to use 3G, it gets a low signal. Like 1 bar or none at all. What can I do? 2G reception is impeccable though. I have flashed some modems on it. But none solved the issue.
Note that the sim card used in it is the same I use in my other phone and the other phone has an excellent 3G pick here.
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