Went to the Genius Bar in hopes that could determine what process was out of control. They were of little help, giving me a replacement iPhone to try and also suggesting I not restore from backup but instead set everything up manually. Tried this, setting up only my Outlook Exchange and loading a handful of apps. Still had the problem.

Because of the flickering notification event, next disable calendar and reminder sync, only getting mail from Exchange. Battery life returned to normal. So searched web for Exchange and battery problems and found this site.
So went to Outlook, deleted calendar related emails and events from both Inbox and Calendar, especially repeating calendar events.
Turned on calendar and reminder sync again and problem with battery life and the flickering notification events are gone.

BTW, earlier when i didn’t R&D on this issue myself, Apple replaced my iPhone 5 times in 4 months becuase i eventually used to restore it from the previous backup .

Later i came up with this idea of making changes slowly; i mean adding stuff one by one and keep a record of them.

That was just FYI, how generous they were on replacements

Regards,
Aamir

Thanks for your reply and suggestions.

The screen during this issue works fine but response is a bit slower than usual; in addition to battery draining the only unusal events i observe are:

1. I can’t delete any SMS; the “delete” option goes off in a flash.
2. iPhone becomes hot even if i don’t use it.

I will try your suggestions and keep you posted.

Thanks again,
Aamir

My guess is the phone is trying to process something internally…like a calendar event or reminder that is corrupt. Otherwise, putting the iPhone into Airplane Mode would not drain the battery.

And just to be clear… does the screen shut off or does it stay on continuously when the Exchange account is enabled.

If that doesn’t point you in the right direction…create a dummy account in exchange (or talk to your Exchange Admin) and sync to it. See if it exhibits the same behavior.

My problem is somewhat strange..!!!

I configure exchange mail, sync my emails, calendars, and then completely switch off ALL radios, like 3G, WiFi, and services like location services, push etc but it still drains the battery (100% to 20% in less that 2 hours) and becomes very hot even if i don’t use it.

Not only that, when this problem starts, I can’t even delete any of my SMSs if I want to; the delete option just flashes

Any idea what could be the problem; i apprciate if someone can help.

Cheers,
Aamir

PS: If i remove the exchange account, my phone becomes normal.

As far as I can tell, this is corruption that occurs through a non-repeatable parameter. It may have to do with traveling – as the individuals it has affected most, always seems to have sync issues when they return to the office. But nothing I’ve pinned down yet…

Have you attempted to reproduce the problem to figure out under what circumstances the meeting request fails to sync?

Looks like AT&T moved this link. I’ve updated the link above and here it is again for reference.
http://www.wireless.att.com/support/tutorials.do?tutorialsCategory=E-mail&tutorialId=851390&deviceId=11990