When i try to make a phone call i says "out of range" and wont let me make any calls. what can i do to fix it?

When the base and handset stop talking to each other, it is generally because of a power interruption. Modern cordless phones transmit a security code from handset to base, when you start a call. This helps reduce the likelihood that you and your neighbor will be talking over each other, if your phones are on the same channel. If they get out of sync, usually the phone will just beep "out of range."

• To reset the chip which holds the security code:
  
  1. Place the phone back in the cradle for a slow five count. Then, pick it up and try it. If it works, you are done. If not, go to step 2.
  
  2. Unplug the telephone's base unit. Slide the battery cover off the handset, and remove the battery. Wait 30 seconds or so. Plug the base unit back in. Wait five seconds or so. Replace the battery in the handset. Place the handset in the base unit for a slow five count (as above). Now try it. This will almost always solve the problem.
  
  If this does not work, it may mean that the chip which holds your security code is now defunct and needs to be serviced. *
  
  
• Clean the battery contacts in case the battery is not getting charged. Clean the charging contacts on your base unit with a pencil eraser. This gives just enough abrasion to rub off any oxidation, without impairing the chromed surface of the contacts.
  
  
• If the battery is new and you are still experiencing problems, the phone will need to be services. Contact your authorized Service Center. *