Has anyone tried one of these Kuke cases from Kuner? http://www.amazon.co.uk/Generation-Battery-Capacity-Multi-protection-Thickness/dp/B019M1UOEE/ http://www.kuner.com.cn/en/index.html Uses a similar chinless design to Indegogo-funded ThinCharge discussed here http://forums.macrumors.com/threads/thincharge-case-for-iphone.1945312/ But unlike the ThinCharge, this is being sold in a place where you can see customer reviews. The Amazon customer reviews look promising. Only confusing part of the reviews is some people claim worse Wifi when the case is on, and some say it's fine. I wonder, is it perhaps a general issue with all battery cases that they can sometimes affect Wifi performance?