It's been a couple of months and I've had this problem with my phone, I was hoping someone could help me out finding a solution since I'm not exactly an Android expert. What happens is that whenever something is running, which includes most apps AND being in a call, my phone would just suddenly shut down, sometimes doing the actual shut-down logo animation, sometimes abruptly. When this happens, the phone will absolutely refuse to turn back on even after countless tries, exactly as if the battery was dead. To solve this, I have to plug in the charger, and when I do that you can see that the phone immediately recovers and realizes its battery's actual charge level, which is usually far from dead. In hopes that these may help with the issue, here's some additional info about the phone: -It's a Samsung Galaxy Y Pro GT-B5510 -Android Version 2.3.6 (Gingerbread I think? I'm not sure about version names.) -When this problem started to happen, I was using the app Winamp (a software to play audio files) and listening to an hour long track. One day, out of the blue, opening the app would slow down the phone perennially and not play said track (which was the last one I was playing, so it was automatically selected as soon as I ran the app). I have since deleted this track (from the SD card) and this problem went away, so it may be unrelated. Also, after not being able to use Winamp unless I deleted that track, I was able to listen to it via the default player without any issues nor the phone shutting down ever. -YouTube is a guaranteed insta-shutdown. Winamp takes a bit but also shuts the phone down after not long. Being in a call almost guarantees a shut-down after 2 minutes or so. -A lot of time ago, some water got to the phone and it went into Factory Mode for quite a long time. This problem has fixed itself and never happened again in about 5 months or so, so it might be unrelated. -I looked for solutions and some suggest it's a RAM issue, because the phone is old and the apps are always more demanding in power. I tried to undo any possible update (which I don't do often, but sometimes I'd connect to the internet and updates would start automatically without me stopping them) but the problem is persisting. -I also read about wiping all data from the phone as a possibility, but that didn't seem to work for the guy. I'd like to avoid that if possible but I guess I'll try it as a last resort. Thanks in advance for the help.