I too jumped ship finally to AT&T for the 1520, 2520 deal (Free keyboard and more than 300 dollars off as well as a company discount). I actually am paying more than 10 dollars more, as I left the rest of my family on Sprint, and got a 10Gig Plan to share between my tablet and phone, I still am rooting for Sprint to get there crap together Possible merger with T-Mobile, or at minimum spark coming to Houston and finally carrying Nokia. DON'T LOSE UNLIMITED PLAN, DON'T SKIMP ON CUSTOMER SERVICE!!!.

I agree that AT&T data network (I'm in Houston) is night and day difference (much much better at the moment), but I'm rooting on Spark coming to Houston. I dropped AT&T a LONNNNG time ago for Sprint, and swore to never go back. The windows 8 phone situation was the only reason why I did (I'm a developer and needed a good windows 8 phone). Once I switched I remembered exactly why I left AT&T, there customer service is Awful, Awful, Awful!!!. I spoke to no less than 30 customer service reps in the week and a half it took to get my devices (Ended up getting my activation fees for both waived and got the 1520 for under 70 bucks because they screwed up sooo bad). They actually canceled one of my devices without telling me, and it took them forever to get it figured out, and I still might get screwed out of my free keyboard because they reinitialized my order after the deadline (They added a note to my receipt, after I asked them to, referencing the original order and stated it was there mistake for the reorder, but nothing says nokia has to honor it). Needless to say, skip the outsourced help if anything arises at all, at ask immediately to speak to a supervisor, they'll transfer you back to the states.

Long story short, once I finally got my devices in working order(the other one they shipped just a week late, was broke on arrival) the phone is AWESOME!!!, The tablet is pretty awesome too, but I really, really like the phone. I'll probably use the tablet more once I get the keyboard as I'm planning on using it as a ultrabook by RDP'ing into one of my Windows 8 Desktops, I just find myself Reaching for the phone way more than the Tablet.

Anyways I've got my family members on Sprint for 1 more year . If they get some descent windows phones and get Spark in Houston, I'll cut my AT&T deal short and come back, If they don't get these things together, I'll have to way out the progress on whether I'm going to give them more time or jump everyone over to AT&T.

Sprint, I wanna come back (Unlimited Data is the way to go) so get your crap together (Also allow tablets on unlimited data plans, even if it is for a nominal fee).

PS just for notes, On my AT&T 10 Gig plan, I've had my phone and tablet for 10 days and have used 3 gig (No streaming any video either, just music, email, game playing, not downloading any apps bigger than 50 mb off of normal home connection). You might think this is because I have a tablet on the plan as well, but you'd be wrong, I've only used 200 MB on my tablet as I usually use it on wireless at the house only. So unlimited really is good, as in the next couple years 10 Gig won't be anything for even 1 user.