I read some reviews on web that iPhone 4S is having battery drain issues but it's not happening on all iPhone 4S mobiles. Well, i don't know whether it's true or not but in my case, my iPhone 4S was really having very bad battery timing issues. Even on Standby, battery drained crazily. For example, at night, my phone showed me 100% battery and in morning, it was on 73% without any use.
So, how did i fix it?
I have been consistently searching on web; first waiting for an update from Apple (which never came) and then i found that Apple has released an update: iPhone4,1_5.0.1_9A406_Restore which many people reported about having improved their iPhone 4S's battery life. I thought, let's give it a try because battery time was already worst and there was nothing to lose even if it doesn't help.
Did iPhone4,1_5.0.1_9A406_Restore.ipsw help?
Well, not really but yes, it really improved battery time little bit. However, it did not help much that could satisfy me. So, my iPhone 4S is now running iOS 5.0.1 (9A406) update. Then i was checking out Apple Community and someone had shared about a trick. Since, there was no loss so, i immediately tried it out.
What's the trick?
Well, it's nothing special. The guy just told about resetting your iPhone 4S's settings. You can do it by tapping Settings menu item on your iPhone 4S Home Screen menu.
Settings => General => Reset => Reset All Settings
I was worried if it would delete any of my data on phone. But, luckily resetting all settings doesn't touch your iPhone apps or data. It even doesn't remove your email accounts (which you might have configured on your iPhone 4S).
When you try to Reset All Settings, it reboots your phone, resets all iPhone settings and then tell you to configure your phone again. Don't worry. Just go ahead and configure it AS A NEW iPHONE. Don't try to configure it from your iCloud/iTunes back up (you don't need it because your apps/data/songs/videos are already there on your iPhone).
So, once i was done configuring my iPhone 4S, next thing was to test whether this trick has improved my iPhone 4S's battery or not. So, i did the following:
- Turned on WIFI.
- Turned off Siri.
- Turned off Location Services.
And here is what i got with one time full charge (not bad, isn't it?):
In short, it's my 6th Day on iPhone 4S and the battery is still not dead (it has 1% to go :)) and WIFI was connected all the time in these 6 days. I never turned off WIFI. I think, my iPhone 4S is doing great. I did the same with my iPad 2 and it's also giving me better battery life. In short, now i am happy with my iPhone 4S and can comfortably take it with me while travelling without having any worries about charging it again and again. :)