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Im a iPhone 4G user almost 1 year plus. Recently im having problem with my iPhone. Its happen frequently. The device will be switch off by itself. It wont be notified before switch off or less battery. I dont understand why this is happened. when people call me during this situation, there cant get my line but i wont know there is incoming call. Even i wont be receiving any notification of misscall message during this situation. I have to frequently check my phone if it on or not since im worry if there is any emergencey/urgent call during this situation i wont know. Could anyone assist me to clarify or this can be repair or rectify.
The one thing you can do is take it to the apple store. It might be a batery issue and the battery needs to be replaced. The apple store would better understand and find your specific problem. But its sounds like what happened on my old Iphone 3GS it needed a new battery, and after that it was fine.
Hope that helps

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