So I want to link my girlfriends iPhone 4S to my Cydia Account but I am afraid to reach the maximum limit. I currently have linked my iPhone 5, my sisters iPhone 4, and my cousins iPhone 5 and iPad 3. I also have linked my old iPhone 5 (which was replaced by Apple due to the common lock button issue). Long story short : how many devices can I link ? Unlimited ? 5 ? 10 ?