I'm aware that 'keep alive' for 3CXPhone for iPhone is an old issue, but thought it had been solved with the introduction of v 1.1.5. Either this is not the case or I have a different problem with the same symptoms - namely, that my iPhone 4s running iOS 6.0 and 3CXPhone for iPhone v 1.1.5 will not respond to incoming calls via 3CX and wifi once it goes to sleep. A call from another extension, for instance, goes to voicemail after the timeout. If coincidentally the iPhone is awakened by (say) an incoming email while it is being dialled via 3CX it immediately starts responding to 3CX as well. I read somewhere (in a sticky?) that keeping your iPhone charging while in the office overcomes this problem; but a) I think this was posted some time ago and b) that solution sort of defeats the purpose of having a mobile phone! Does anyone else still have this problem, please - or even a solution?