T-Mobile USA took a bit of a hit back in Q4, following its failed merger with Ma Bell, but things are looking up for the magenta network. It still took a 2.8 percent hit in terms of raw revenues, taking in $5 billion including service and equipment sales, but it’s still proud to report a net growth of 187,000 customers and diminishing reports of customer losses when compared to previous quarters. T-Mobile’s branded net customer loss of 510,000 marks a 28-percent improvement over its 706,000 Q4 loss, and is bolstered by a 13 percent increase in prepaid customers, totaling 249,000. The firm blames its previous quarter contract losses on the widespread availability of the iPhone 4S on its competitors’ networks. It’s also assuring investors that its lauded 4G rollout is still underway, and noted that it has signed agreements with Ericsson and Nokia Siemens Network to upgrade 37,000 cell sites with LTE hardware over the next two years. The company hopes a brand relaunch (and the availability of handsets like the Galaxy S Blaze 4G, Nokia Lumia 710, and HTC One S) will drive customers to the high-speed network as it fills out over 2012 and 2013. Hit the break for all of the financially riveting details.