Speaking at the MoffettNathanson Media & Communications Summit, T-Mobile Chief Technology Officer Neville Ray has provided a few key details for how a merger with Sprint might work. Comparing the network integration to the company’s previous merger with MetroPCS, Ray explained that the bulk of the process would center around migrating customers and would be relatively simple. To begin with, the primary asset of concern in the merger would be Sprint’s spectrum holdings. That would be used to build out T-Mobile’s network further, adding both scale and density. The new carrier would also avoid building out new infrastructure as much as possible over the short term. Although the merger is, according to Ray, still at least a year from gaining approval, the next step would be to begin switching Sprint customers over to the new T-Mobile network. That shouldn’t be too difficult either; Ray says that a substantial portion of those customers – around 20 million – already use handsets that are compatible with both Sprint’s CDMA network and T-Mobile’s, which is GSM-based.