I'm trying to use an MHL adapter that is for the SIII and I can't get it to work. I'm thinking that the charger I'm using to power it is too weak at only 700mAh. Do I have to use the 2A charger that comes with the phone in order for this to work? I haven't tried it yet (I'm at work) but I'm trying to rule anything else out while I'm here. Thanks!