Hello,
I did -> Go to Settings > General > Reset, then tap Erase All Content and Settings, but it did not ask for any icloud id & password, I assume it means I had disabled find my iphone before reset, right? Now, will it ask for cloud id & password during re-activation?
Please advise.
iPhone 4S, iOS 7.0.1
Yes, the next owner will face a locked device where he must enter your Apple ID and password in order to unlock it.
I'd recommend following steps:
1) Disable Find my iPhone
2) Log off from iCloud, delete everything from your device
3) Disable FaceTime and iMessage
4) Do a full restore (w/o backup) in iTunes
This way, your phone is fully wiped and ready to sell. Erasing content and settings inside iOS does not apply a whole new image of the operating system, it only erases all data which could be less safe if you want to sell it.
Here is an Apple Support document that details what steps you should take. What to do before selling or giving away your iPhone, iPad, or iPod touch
precautions before selling iphone 4s
