I signed up for Square last month and used it on my Razr Maxx. It worked like a charm and the registration process was a cinch BTW, be sure you read all the reviews for the Square app before downloading it. It appears that some users weren't too pleased about a long wait for their money to get deposited into their bank, especially if it's a huge amount like $1,000 or more....knowing that piece of info, I won't accept large transactions then
I would recommend it for simple & small transactions
Thanks for writing into Square Support. The Motorola Droid Maxx XT1080 is currently not supported. There are several thousand Android devices on the market, and we strive to support them all. In some cases, however, the Android device may meet all the requirements for compatibility but still not communicate properly with the Square hardware or the Square apps.