In February 2012, I have now without difficulty get a new version of the case (old went free of postage back) and thus the problems are indeed eliminated - no echo when calling for the opposite on the other side of the line :)
Service was also great and quick.
The case itself nestles comfortably in the hand and is by the nature of the surface and less risk that the iPhone may fall.
Clear weight of the iPhone is there so much higher - but also normal and due to the battery.
By Case I can fully charge your iPhone once, when it is activated at about 30%.
Hello There,
I can unfortunately only confirm what has already been written.
Anticipation, the battery pack works well and the service is great. For me the switch inside was broken and within three days, a replacement was there - with free return label for the old pack.
It goes in hard, but well that's just like that.
The biggest problem is that hear my interlocutor twice. I also have an iPhone 4S, with its predecessor, I have the Pack is not used.
I specially requested a new Apple iPhone on the exchange program and here occurred the duplication - but only after I have the iPhone inserted into the pack. Even the SIM card exchange brought no other result.
I've just then taken the iPhone get out of the pack - directly previously been a problem yet, then it was gone. I also suspect because the microphone opening is obscured, causing somewhere around here to a sound that produces a doubling.
Anyway, so it can not be used and will unfortunately at Raikko after returning requests :( Too bad.