How do I get rid of unnecessary apps? also, how do I delete messages from my S2?M

[AC Question]

My phone says insufficient storage. This device doesn't have enough space to download : "Messenger". Consider deleting apps or content you no longer need and try again.

 

[Javier P]

Take a look at this guide.

http://forums.androidcentral.com/showthread.php?t=315804
[GUIDE] Android Memory and How to Deal with Low Memory Warnings