I'm grandfathered in on a very old Verizon much higher discount.
They call once a month trying to offer me something, anything to change my plan.
Everytime my contract gets close to expire, I just renew and keep going.
I have the same thing with my Sprint plan, grandfathered in eith an old plan that they can't come close to beating. Unfortunately Tmobile bought Sprint, and they will only honor Sprint contracts for about 2 more years, then mine goes away. Don't know who I'll go with, I'll figure that out when the time comes.