HQRP Phone Battery for AT&T/Lucent EL41108, EL41208, EL42108 Cordless Telephone Plus Coaster

hello youtubers if you are here you've probably picked up an extra handset like this one of the yard sale or at Goodwill and you want to add it to your existing AT&T base this particular one is the el5 one two zero three and it's also the el5 two two zero three those two models and what you've probably found is that it says out of range or no power at base and you can't seem to clear that out in order to program it to your new base so that is because it is already programmed with the previous base and they're paired together they need to be unregistered to that base so that you can program it for the new one now if you've called AT&T they've probably told you one of two things one you can't do it on this model because they probably just can't figure out how to do it it may not be in their books I know I've had trouble with them on this or they might have you dial 18 T's factory menu acc