Is it good to do a restore of the phone after updating to the 5.01?

[yodayoda]

Or is it not necessary?

 

[Undecided]

Or is it not necessary?

Not necessary. However, if you're having battery issues and did a restore when you upgraded to 5.0 (or when you setup a new 4S), I urge you to install it as a new phone and not restore. That solved most if not all problems for me. I lost my texting history, and had to restore files for certain apps, but syncing basically restored all the core things (contacts, etc.).

 

[Mr.C]

As already mentioned it's not neccessary.