How did I know this would devolve from a help the OP with his problem into a Sprint's network sucks thread, LOL.
Been with Sprint since 1999. In fact, just got my wife a new iPhone 5, 64GB on Sprint about three weeks ago. This is where "Sprint sucks" worked for me because her phone was sitting in Apple's stockroom since November and came with 6.0.1. Which I then jailbroke.
Anyway, 3G sucks on Sprint. That is a fact that cannot be argued, except in places where Network Vision has solidly been implemented. LTE is debatable depending on where you are.
Some notes. Gary Forsee ran Sprint in to the ground. See, he used to be the CEO and not Dan Hesse. Forsee allowed the network to deteriorate. No maintenance, no updates, no upgrades. Then Forsee bought Nextel. Forsee got run out on a rail some time later. Enter Dan Hesse who inherits the mess Forsee created.
Dan Hesse is no prize. But he has the FCC telling him that he MUST use certain spectrum or he WILL lose the licenses for it. LTE then is only a concept. WiMax is all he has because at the time Sprint has no money. So, he partners with Clearwire and sells them Nextel's spectrum to use.
Clearwire is badly managed (even worse than Sprint) and stops building out WiMax. So Sprint comes up with Network Vision, dumps WiMax and gets taken over by Softbank. That enables Sprint to buyout Clearwire and get back the spectrum it sold to them.
So now, over 38,000 towers that have not seen updates or upgrades because of Gary Forsee are being ripped out and replaced with all new equipment. That takes time because of licensing, local regulations, landlords and backhaul. Some towers, because of Forsee's negligence have equipment dating back to 1998. Further, Sprint is also integrating the old iDen towers and the Clearwire WiMax towers (because now Softbank gave them the money to do so) into the LTE network.
And that's the other problem right now. Backhaul. There are only a handful of companies that do this. And guess what, a lot of them have ties to either Verizon or AT&T. So where's the incentive to be timely for Sprint?
In my area (Phoenix) many towers have been upgraded. Since late August, LTE has mushroomed out here (getting closer to my home), but Cox and Centurylink (AT&T relationship) are being freaking slow to deliver fiber optic backhaul. Hard to be faster when there is nothing to hook the new equipment up to.
I am not a defender of Sprint. I've had my own go arounds with them and even managed to get myself banned from their forums. Just explaining.