You indeed may be able to get out of the lease, though you are advised to consult with a landlord-tenant law attorney first, before acting--breaching a lease improperly, when you don't have valid grounds, can result in you being liable for all the remaining rent due for the balance of the lease term. It's therefore well worth the cost to have an attorney's assistance.That said, since analog or traditional phone service is so ubiquitious and common, it is indeed the "default"--it is fair to say that people would expect it to be present (or at least available as an option; e.g. jacks in place which have turned off but which could be easily/cheaply reactivated) unless specifically told otherwise. Thefore, the failure to disclose something which a reasonable renter would take for granted could be considered a material omission which precluded a meeting of the minds or the formation of a valid agreement, and therefore grounds to void the lease.