Shares of Dish Network closed up nearly 11% on Wednesday, reaching prices not seen since mid-2019, after the satellite TV company announced a partnership with Amazon Web Services to deploy a 5G network on the cloud provider’s infrastructure. Dish, in addition to distributing video, is attempting to become the fourth national wireless player, behind T-Mobile, Verizon and AT&T. That could help Amazon expand its own cloud business, a key source of income that grew revenue by almost 30% in 2020. Meanwhile, Microsoft, the second-largest cloud infrastructure provider behind Amazon, also is keen to get carriers building 5G networks in its cloud. AT&T uses Microsoft’s Azure cloud, and last year Microsoft acquired two companies targeting carriers. AWS already works with Verizon, the largest U.S. wireless provider.