T-Mobile and Sprint continue to upgrade their own networks despite merger plan

On April 29th, T-Mobile announced its plan to merge with Sprint. The deal still needs to be approved by U.S. regulators, and it could be a year or more before both carriers close on the transaction. In addition, there always is a chance that the merger doesn't get approved. Remember, back in 2011 AT&T agreed to buy T-Mobile for $39 billion. The deal was killed by AT&T after the Justice Department filed a suit to block the transaction.
In a letter to clients, Deutsche Bank notes that neither T-Mobile or Sprint are slowing their "pace of activity" since the merger announcements. T-Mobile continues to expand deployment of its low-frequency 600MHz spectrum (that it paid nearly $8 billion for in last year's FCC auction), and is expanding capacity in certain markets with the use of small cells technology. Sprint is expanding the use of its high-frequency 2.5GHz airwaves and using newer macro sites and small cells to expand coverage. The global bank says that both firms would have done the very same things had no deal been announced.
"Small cells and towers are not mutually exclusive and the carriers all agree that macro towers remain the cheapest, most cost effective means of deploying spectrum. Based on conversations, questions remain around small cell returns, though the addressable market seems massive."-Jefferies
Those working on Wall Street say that the T-Mobile-Sprint merger isn't going to affect plans by Verizon and AT&T to spend on their pipelines. The Deutsche Bank analysts see Big Red working on LTE densification and laying the groundwork for 5G. AT&T is adding new frequencies including 700MHz and AWS-3, that will contribute to the top line next year.
One thing that is surprising several analysts is the carriers' continued spending on macro tower build outs. Many had figured that the wireless operators would be working on adding small cells instead of upgrading their large towers. Macro towers are expected to be a major part of the carriers' 5G build out.
source: FierceWireless