Sprint has informed us that it is closing various cell sites in NYC. Sprint has notified us of its intention to assign our lease to Clearwire. Sprint is in its second of five 5 year options (about 18 years remaining on the lease). Clearwire has requested that we complete an estoppel certificate stating the lease term and that there are no defaults. Our lease prohibits assignment without the Landlord's consent. The landlord is hesitant to consent to an assignment. 1. Is Clearwire a credit worthy company? 2. Can the Landlord get a rent increase in exchange for consenting to an assignment? OR should the LL wait for Clearwire to request permission to perform upgrades?