How to upadate galaxy s2 (i9100) to lollipop with CM 12.1

http://galaxys2update.com

[Stable] How to Install Android 5.1.1 with CM 12.1 - 5.1.1 Lollipop on Galaxy S2 I9100

# Supported S2 Models----------------------------
This Package is For Galaxy S2 :
i9100,GT-I9100,GT-I9100M,GT-I9100P,GT-I9­­100T,SC-02C

#Download the files from here
http://galaxys2update.com/