I upgrade my i phone 4 to the last version but i didnt personal hotspot, i upgrade my i phone 4 to the last version but i didnt personal hotspot, i upgrade my i phone 4 to the last version but i didnt personal hotspot

I upgraded my i phone 4 to the last version but I didn't found personal hotspot, even its available at my friends phones at the same carire

I started experiencing the battery drain problem after:
I updated to 4.3.4 on my iPhone 4.
Installed the Google+ iPhone app.
I added an Exchange account email access for work.
After this my battery would be down to 10-20% life after 5-6 hours. Prior to this my battery would last for several days without a charge. To resolve the problem I did the following:
Removed my Exchange email account.
Changed the notifications for Google+ to just badges.
Reset network connections.
Turn the phone off then back on.
Please note that I did NOT have to perform a restore from backup.
I'm happy to report that after 3 hours since the last charge, my battery level is still at 100%.
I may try to add my Exchange email account back on the phone, but that may re-introduce the battery drain problem.
-frank

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