Beware that SERO specifically says PAM (phone as modem) is not allowed.
I switched from AT&T in October and then moved my wife in November. As of yet I have spent more time fixing simple screwups from Sprint on moving my wife over, mine was simple as I was not doing anything "special". Here is the horror story on getting my wife set up. Called into the SERO center to order my phone as I wanted to port her 10yr old cell number over. She was looking at the Samsung upstage, knowing how small the phone was I had her go to the local sprint store to play around with it and she decided she wanted it, so that was the phone I ordered. After talking with the rep when I placed the order the phone was supposed be sent activated with a sprint number and then once we got it and played with it for a week we we call in and do the port. Problem 1, the phone arrived with the port already in process. The port also took a week to complete so during this time she had to carry both phones. We the upstage was crap, dropped calls, flipping only worked 90% of the time, menu key stopped working, so we called up CS to get an exchange. She wanted to go back to the razr (gasp) since this is what she used on AT&T and was used to it. They were supposed to send out the razr and then we would call in once we got it and activate the razr with the now ported#. After 3-4 days and no phone, was supposed to be sent over night, we call back and get the oh I am sorry you have to send the upstage back first and then we will send out the razr, OK first time I have ever heard it done this way, but we need the phone so we send the upstage back, send it on wednesday, they get it back into thier system on friday. come wednesday of the next week still no razr, again this was supposed to be overnight shipping. We call back in and are told, ever so friendly, they cancelled that account, upon getting the phone back. At this point I am furious as we have no phone, our 10 year old # is caught is limbo, AT&T is saying it is not in thier system and would need to be done as a port in to them now, Sprint says they number cannot ported out for 60 days. So off to the store I go. SERO or not I have to keep this number. In the store they were great, activated another line on the account and then started with the programming of the new phone with the ported number, but ran into a problem and had to call into the porting department, got the typical indian person and the sprint store rep even said "give me someone who speaks ENGLISH". The store reps were unanimous in saying that customer serviced being outsourced has made their jobs 1000 times worse and they spent most of thier days fixing their mistakes. Finally we got the number ported to a brand new red razr and all seemed well. Then we got Decembers bill. See when we sent the upstage back, the credited the sprint account $163.99 so my bill in November showed a credit of such on the account and that is what $52.50 of service was paid with. Since we had already paid for the razr in the store, which the manager only charged me $10.00 for I wanted my $161.99 that I had paid for the upstage back, well guess what, Sprint doesn't issue refunds back to credit cards was the story I got. After a little arguing about how absurd this was the finally sent a check for $109.49. This was the $161.99 - $52.50, OK now everything seems good. Phone are right, money is right, loving my centro and unlimited data. Then comes Decembers bill. On it we are showing a previous balance of $52.50, we are being charged a @26.00 activation fee for the line the had to activate to get our ported number back and a months service on that line. Had to call back in and get this all straigtened out. Another 2 hours of my time. I must admit on the last call I actually called the SERO support line instead of regular CS and it went alot smother. So as others have said always use them and not *2 or the regular CS #. After getting all this fixed my bill dropped to 48.15. I paid this but I am waiting on the surprise that will January's bill. I told the rep I still didn't think the bill was right as I have 2 phone on the @ $ 30.00 so my bill should have been around $65.00. He assured me it was right but we will see. Also they tried to deny the rebate on my centro and I had to call the rebate center to get that fixed. On that call I felt like I was back on AT&T, call was answered quickly, gentleman spoke very good english, understood the problem and had it resolved and expedited within 10 minutes. They denied my rebate saying my model was not eligible but when I told him the flyer they sent with the phone, had it listed as one of the models, he said it had to do with the phone being called the "Palm Centro" and the "Palm Treo 690" in different areas of the system. Coverage has been great for us. We actually get a signal in church and other building where we did not before with AT&T but the CS is severely lacking. Again other than the rebate my account has been flawless. My wifes has been all the problem. So I guess if you don't do anything "special" you should be ok. Beware that SERO specifically says PAM (phone as modem) is not allowed.