Originally Posted by waheed iqbal
Is iOS 7 compatible with iPhone 4 as normally as 5 & 6 version
Plz tell I want to upgrade it
The article GG linked to is probably a pretty good guide. There are some things missing .... whether they're important to you, only you can decide.
I have upgraded my iP4 and my iPad2 to iOS7. I use the iPad tethered to the phone when out and about. No problems at all.
My point being that if you are more of a phone, text, email and occasional browser user on a phone then you wont notice any difference. iOS7 runs fine on an iP4. I personally think iOS7 looks better on a phone than on the iPad - but that's just me.