sorry guys pretty new to jailbreaking etc.
I understand that the iOS 8.4 has stopped being signed, but i my phone has developed a fault and apple say send in for repair under warranty, but they say they will repair the phone after assessing there no physical damage, and upgrade to latest iOS which I say I dont want.
The question is, is there anything i can do now before i send it back to them so i can restore my 8.4 ios with working TaigG jailbreak when i get it back?