Dish Network’s repeated claims to be building a very low-cost 5G network have been cast into doubt on several occasions over the past year, when the operator has been forced to seek new funds. Most recently, Dish finalized a $2bn debt offering in November, and now it is planning another one, this one involving about $500m of its senior secured notes. Much of the proceeds are expected to go towards further build-out of its greenfield, cloud-native 5G network, and the notes will be secured by Dish assets, probably its spectrum. According to financial analysts at Raymond James, in a client note: “As we wait for the pricing of these notes, we think Dish will need to raise additional money later this…