I've tried both SIM cards on my Nexus 7. The AT&T plan costs $30 for 3.0 GB whereas T-Mobile charges $35 for 3.5 GB... Same price per GB monthly.
No luck with T-mobile's $30 deal......
For my location, I will go back to AT&T next month for it has a more comprehensive coverage at a much higher download speed on average than T-Mobile, from which I often get less than 1 Mb /sec..... The highest speed I'd gotten was outside a T-Mobile store in a parking lot...... It clocked in at a mere 5.5 Mb/sec....
Often I get connections so slow the nexus 7 is not practical to use. At home, I have clocked speeds from 0.7 to 3.0 Mb/sec... I don't live in the boonies and there often is a long wait before the download starts..... It drives me crazy...... Rarely had that issue with AT&T at the same locations. I switch back to WiFi at home when my Nexus 7 works on the T-Mobile network...
It's difficult for me to imagine T-Mobile's high speed connections as people have raved about...... Am I doing something wrong?
AT&T gets me 3.5 Mb/sec on average where I live, about 20 miles NW of Detroit. Occasionally, I'd get as high as 12 Mb, and but not too often.
I would recommend that you check out the coverage with both networks where you'd be using the Nexus 7 to make a right decision for you...
With my Samsung Galaxy SIII on Verizon network, my average DL speed is 15 Mb and a few spots with 56 Mb close by......
Only if the nexus 7 works with Verizon LTE..... I think it's the only fault with the new Nexus 4, and 7....
Of course, your mileage may vary.
Sent from my Nexus 7 using Android Central Forums