The greatest think about iOS 4 is you can easily disable all cellular data without using airplane mode. I can actually consider getting one to use as a basic phone + iPod again, without having to sign a contract with a data plan, and without jailbreaking or unlocking the phone.
Supposedly if you buy in the US at contract prices ($199 and $299) you will be required to activate a contract. If you don't, you will get charged the noncontract prices, which start over $600.
But then there are claims that people are buying them in the US to export to countries like China where the iPhone 4 hasn't been released yet.
So not sure how they get around that. Will they even let you buy on cash or without a credit check?
I'm still a bit puzzled about the battery draining while on wifi... Phone still on airplane mode, it's been on for a whole day (playing music and stuff) showing hardly any signs of tiredness... But as soon as i turn wifi on, the percentage just takes a hammering. And that's without me actually using the internet connection, it's just sitting there doing nothing.
Can Push notifications (FB and Gmail) drain it so much in such a short time??
It's still at 45% charge with 7hour usage and 1day1hour standby, but it went down from around 60% to 45% in a couple of hours when i turned on wifi.
Now that it's off again it's stabilised.
Why don't you disable Push Notification and tell us.
When you have tested with Push Notifications off, try and enable it just for Facebook, then Gmail and lastly for both.
Well the 4.0.1 update is suppose to make the bar display more accurate. But it's relative, as one bar on a different model means different signal level than 1 bar on an iPhone.
I've heard that it's not as big a problem in other countries, which presumably have better networks.
But you could do speed tests under different reception/location conditions to see how the data is affected.
If you're only getting Edge in an area with coverage for 3G, your signal strength is probably close enough to the threshhold for transition that your phone keeps trying to switch between the two bands. Like switching between cellular and WiFi, this transition can interrupt the current connection and can make it seem like data services aren't working.
It's usually better to have the slower of two overlapping connections than to keep phasing between them.