"A great phone, but not without faults. Be careful!"4.0 starson by Havraha
Pros: Super Amoled Plus screen is tremendous, size is great, Android operating system is fantastic and TouchWiz 4.0 is actually very nice.
Cons: Super Amoled Plus Screens may have lines in them from poor calibration, Call Quality drops and echoing becomes a serious issue with any kind of case, battery life is absolutely terrible. Chance for your charger to be bad too (like mine).
Summary: Some Super Amoled Plus displays have "lines" on them from a poorly calibrated screen: it seems to be happening to a lot of the Galaxy S 2's, but thankfully not any of mine (and I bought 3 for the family). Call quality becomes terribles / echoing becomes outrageous when any kind of a case is applied to the phone -- google Samsung Galaxy S 2 Echo. No one can decide if its the mics being covered or if there's a faulty part being installed in this device. Also, my charger was broken -- it would reach 100% charge on the phone and then disconnect and reconnect over and over again. I took it to the T-Mobile store and the guy opened up another Galaxy S 2 box in the back and we exchanged charger bases, and so far that's fixed the problem. Additionally, battery life is abysmal. With heavy usage starting at 6 am in the morning, I was below 50% battery life by 10 am. I don't know what to do about this problem. Suggestions are welcome!
Overall, though, I'm still impressed by the phone even as I continue to look for call quality and battery solutions. If you're like me and you're coming from a Blackberry that has super battery life, though, be warned about this one.