I updated and have had no issues at all. The update downloaded in 10 minutes or so, and took about 35 minutes to install. Everything has worked well since and as far as I can tell there are no issues.
Be aware that you will always see a predominance of complaints and problems here rather than success stories since Apple Discussions is intended as a place users can came to look for help. Don't let the negative stories put you off - I suspect there are many more positive ones that never get posted!
he ive had it on mine for well over 2 weeks and i love it bit shattered that some of the features dont work as of yet but well worth it ..... had no problems with it at all
I downloaded it about 2 hours ago, only problem I've seen is the pictures are blurry, but apparently you can just re-sync and they will show clear again.
Never had any problems losing any contacts or anything
Hi there, Just updated my iPhone 3GS 16GB with iOS4. Everything works great except e 'grainy' photos. But no worries, just re-sync your photos with iTunes and it will be fine 🙂
Folders only hold 12 apps each...a bit disappointed with that...the task switcher is cool, but every open/shut app goes there...will have to play with that a bit...downloaded iBooks...cool...waiting for Slacker to update to multitask...
It's killed some of my apps which won't even open. Maybe I should have known this but some apps DO NOT work with iOS 4.0 - I would say 50-60% of my apps either don't open at all, or don't function properly once open. I feel disappointed, I thought the apps would at least be backward compatible but maybe without multi-tasking but UH UHHHHH, FAIL!! Just be sure you're apps are compatible. Without some apps no matter how good some features are it kills off half the reason for my iPhone.