A slow phone can be incredibly frustrating
If you're an iPhone user, this tip may be of interest to you. It's inevitable that a phone will slow down at some point if it's stocked up with apps, photos and games. While this is not a long-term solution, enforcing a memory-dump will free up some of the phone's RAM.
There are two simple steps involved in this process. First up, press and hold the 'power' button until this screen appears.
Then press and hold the 'home' button until you are taken back to your home screen. This signals that the RAM flush has been completed.
This has a similar effect to double pressing the 'home' button and swiping up each open screen individually but takes less time to do.