A friend has loaned me an LG P505, locked to AT&T and I'm thinking of activating it on Straight Talk. This is intended to be a temporary solution to carry me until either Sprint or T-Mobile gets around to deploying 4G LTE in our area. The current AT&T "4G" coverage is HSPA+ (which is academic, since the phone only does HSPDA). I understand that ST offers 2.5GB of "high speed" data then throttles your speed. What I don't understand is does this mean 2.5GB at up to 4G speeds then 3G or 2.5GB at 3G or better speeds, then 2G? I'd be grateful for any answers.