How to prevent my iphone 4 from constantly crashing?

My iphone keeps crashing and it's beginning to prevent me from waking up on time, I have iOS 7.1.2 I think and it only started happening last week, any way to fix this?

Throw the piece of junk away and buy an ALARM CLOCK!

My razr has never crashed.

Is your contract up? If your contract is up, then I would trade it in and upgrade because its a free upgrade for you since 5C is free on 2 year contract (plus they even give you some $ for trade in even if its not working right, but at least its something)… And iphone 5S $79 some places, no reason not to upgrade.

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