What are your dissapointments in Ios5 ?
Here are some of mine ...
1. Not able to delete useless contacts in mail app
2. Not able to close all open apps at once
3. No manual settings for equalizer in the music app, all presets settings are worse than the "off" preset
4. No quick turning bluetooth on/off
5. Safari is a little better but still "basic" browser
6. Why not displaying the date next to the clock on top of the screen
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re: #2 ... the only extra apps that run in background are music. As for the listing of apps that are open ... many are confused ... they are not running in background like in Android or MS. They are more like desktop so you can pick up where you left off when you do indeed go back to that app. iOS automatically eliminates apps as RAM memory is needed for your latest action. People who are directed to go into and delete them don't really understand RAM memory control in iOS. It isn't necessary.
re: #4 ... yes I would like a quick toggle for bluetooth on/off. But, I know how to do it ... so it takes a couple of extra steps, not a big deal.
re: #5 ... Safari works well, and the fact you can't customize with extensions is really perfect ... as that is the way the MS screwed its self with malware potentials. Security is paramount, and Apple really need a solid design for enterprise ... and certainly consumers benefit as well. If customization isn't well thought thru and you open the flood gates to do anything you think you would like from the past ... then you also have to live with all the side effects.
Just check out what Motorola just did for EU... the allow direct access to the root. So you watch what the malware folks do with that one. Enterprise will reject that approach is a heart beat.
re: #6 ... good idea ... it will probably show up in the next few OTA updates. Just be patient. In the mean time you can look at Calendar as you start your day and you will know what the day and year are. Not a biggy.