I am on iOS 5.1.1 (jailbroken if that matters) and want to update to iOS 7.0.4. Now which would be safest way for me to go about this so that i do not lose anything like SMS, Contacts and hopefully whatsapp chat history. I tried in morning with my iPad and it gave me some error when i tried updating in iTunes (using IPSW, shift + update) and then my iPad went into recovery and then i had to use shift+restore with downloaded ipsw and then restored the backup but seems some apps did not restore back, no idea why. Please suggest. PS: I will be downloading IPSW of iPhone 4S because i do not have good internet and many a times iTunes update gets interrupted and starts all over again wasting too much time.