Fix a phone which constantly shuts down randomly

[Android Question]

In the past few days my phone ( Samsung Galaxy Y GT-S5363 ) has begun to constantly turn on and off of it's own accord.. It's really starting to irritate me so any shred of advice to help me get it back working properly would be much appreciated!

 

[Rukbat]

If it's shutting off by itself and you have to turn it back on manually, I'd suspect a bad battery. If it cycles on and off by itself I'd suspect bad firmware, either because you've been fooling around with rooting or ROMS or because you got a bad OTA update.