There are several installation methods to choose from, each one based on a different ROM. This will work on any Galaxy Tab 10.1 running the newest stock ICS ROM and derivatives, CyanogenMod9, or CyanogenMod 10. From there, it’s a matter of downloading the appropriate files and flashing them in recovery. The method was released by XDA Senior Member almaqdad. So far, the only issues being reported is that sometimes you have to drop to 2G to get the calls to work properly.
There are some restrictions, though. This mod is intended only for users who own the 3G version of the Galaxy Tab 10.1—namely, the GT-P7500 version. So those who don’t have this particular version can’t take advantage of this mod for the time being. If you’d like to know more, check out the original thread.