One, jailbreak apple phone
1. Open Cydia, add the domestic source address (Apt.weiphone. COM), install Appsync for iOS patch.
2. Since the jailbreak, the use of Third-party clients to download cracked applications, because the third party client principle is to buy the Apple process to obtain the installation files of each app, and then put on their own server for users to download through their own clients. After downloading to the PC, connect the iOS device via the data cable, and simulate the communication specification of itunes to install the application in the device. This makes all applications installed through this type of client the corresponding Apple ID is the client's Apple ID, not the user's own device on the common ID, so even if you enter your own ID is not valid.
Workaround: Use the repair Flash feature for the Third-party client to fix the process.
Two, not jailbreak apple phone
1. We can reboot the phone to see if it can be solved if we can't get rid of the memory in the phone.
2. If the above method is not good we can try to use the PP helper to repair the flash back function
3. If it's still not working, we can try to remove the Flash software and download the same software from the App Store.