Hi every Sifu, Otai and Guru of jailbreak.. I am noob for this iPhone jailbreak thing.. Currently I am using ip 4S and jailbreak on ios 6.1.2.. Everything works fine for me. But I have 2 questions haunted me for several days already. I need some advises.
1. What will happen to my back up data(purchased apps, pictures, whatsapps messages and etc.) before jailbreak when I connect to iTunes with new purchase tweak from Cydia? Do iTunes will auto sync apps that I have purchased from Cydia and Cydia itself?
2. Let say apple launches new ios, I need to do factory restore to update my new ios. After I have done updating new ios and Re-install back my backup data, do iTunes will sync back my jailbrake data( apps and jailbreak's ios)? with a situation I have auto backup my data after the first jailbreak. Otherwise, if I purchase apps from iTunes apps store after jailbreak my device, then I sync my ip with iTunes plus auto backup, after i have done my factory restore, will this "legal apple apps" still can be found in my iTunes?
Thank you so much for enlighten this noob about jailbreak.

Thanks azraeil. Now my worries all are gone with your kindly answer. So I can straight away enjoy my jailbreak.

Hi all jb sifus, otai and guru..
After I have jb my iPhone 4S I found that my icon shrink from original size.. Why ha? how I can fix it? I have notice that if the phone in safe mode icon will be back to original size.
By the way what is safe mode? Can we let i devise in safe mode? Hahaha too many question for noob like me..

As i remember I just install sbsetting+activator, winterboard, noki HD theme, cascade tweak and beytaFont.
I don't think coz of ios, due to I have updated to the most recent ios 1.6.2