UPDATE: Phone's 4G stopped working about 1 hr after I came back from MetroPCS. It still does not work, and I will be busy with work so I cannot fiddle with any settings. Very disappointed for now. I see another fellow who has the same issue. Will update.
I just came back from MetroPCS.
First of all, it works. I get 3000 KB/s download speeds 300 KB/s upload using speedtest. I'm in the bay area in CA.
It took the MetroPCS rep over 30 min to get it set up. The rep tried multiple APNs to finally get one that worked with the phone. The phone would always read the SIM, but could not get data to work. I'm not sure what setting worked in the end, but it's working currently.
It works! Great phone. I got the 16GB $199 version and it's more than twice as fast as my S GS3. Very high value compared to what else is out in the market. I almost bought a Moto E 2nd gen 4G for $150. I was waiting for a Moto G 2nd Gen 4G to be released....but the ASUS is significantly better than either phone spec wise. If everything works out with this phone, it's the best value currently on the market. Talking about the $199 version.