Now that T-Mobile USA’s merger with Sprint looks set to be finalized within two months, the company can start to discuss, publicly, the challenging process of combining two very different networks, and delivering the many 5G promises the companies made to justify their marriage to regulators. One approach may be to adopt O-RAN architectures to try to reduce the cost of migrating two networks to a common 5G system and expanding this rapidly to compete with AT&T. The two operators have very different histories and cultures when it comes to their mobile networks. Sprint has been more focused on engineering and on bold technical decisions, although that has backfired in recent years as it has gone through some unnecessarily complex…