Extra handsets no longer seem to work. No ring and no line

with cordless phones the problem is that the hand sets have to be recognized by the base station ( paired) and unless you have the exact hand piece make and model this pairing and recognition will not happen
if you can get 2nd hand units for the 3325 base then the base will accept them ( any number of additions ) but if the hand piece is different it will not work
you you need extra hand pieces then it may be best to consider a new system where you can buy extra phones and chargers

must be sure handset ringer volume is NOT set TO off
2) THE Telephone line cord and power adapter are plugged in properly.
3)the handset may be too far from the telephone base. Move it close to the telephone base.
4) many extension phone on the telephone line to allow all of them to ring simultaneously.
5) if other telephones in your home are having the same problem , the problem will e in service provider
6) other electronic products such as HAM radio detect the phones cause interferences.
7)test a working phone at the wall jack.
8)remove and install the battery again and place the handset in the telephone base
9) wait for the handset to synchronize.
God bless you

:.. extra handset ..." implies you have another handset. Try the battery from that handset in the "extra." If it works, the replacement battery you bought is defective.

Hello, 1st step would be to make sure the phone still registered, mines keeps unregitering and it works after I reregister it, hope that helps.

The 6125-2 only supports 2 handsets.

Cancel the old handsets registration at the previous base unit if desired.
For additional handsets, you must register each of them at the new base unit. Only one handset can be registered at a time. A handset will be assigned anextension number at registration.

Make sure the base unit and the other handsets are not being used. Program the same way as the extra handset you bought.

Registration must be completed within 1 minute.

If you're trying to get 5 handsets to work with one base, it won't work. The 4215 can only handle 4 handsets, the base handset plus 3.

When I had to replace the base of my 4 handset system, the base handset still worked. Therefore I had an extra handset which couldn't be used. So I decided to buy another base. Now I have 6 handsets which can be grouped 4,2 or 3,3.

OU might need to deregister the hand set first by holding down the red end (hang up key) and keep it down while holding the # key. If deregister wont work use base unavailable and yes, you are sure twice.

List the handset numbers of those working handsets
Using a WORKING handset follow these directions
Resetting Handsets
If you want to register the handset to a different base or
replace a handset with another one, you must first clear the
registration information from the base and the handset.
1. Press and hold [ ] and [#] for
at least 5 seconds, until the
SYSTEM RESET menu
appears.
2. Select the DEREGISTER HS
submenu. WHICH HANDSET?
appears in the display.
3. Move the cursor to select the handset ID to be de-registered
from the list, and then press the OK soft key. DEREGISTER HS
appears. CHOSE A NUMBER THAT IS NOT ONE OF YOUR WORKING HANDSETS
4. Move the cursor to select YES, and then press the OK soft key.
When ARE YOU SURE? appears, select YES. You will hear a
confirmation tone.
PUT THE HANDSET IN THE BASE CHARGER AND IT SHOULD REGISTER

Hope This Helps - It worked for me

Uniden TRU8885-2 Cordless Phone > User Guide E X P A N D I N G Y O U R P H O N E w w w . u n i d e n . c o m Register the Handset to the Base If you purchase an extra handset, you need to register the handset to the base before use. Only one handset can be registered at a time. The handset ID for the supplied handset(s) was assigned at the factory, which has #1 or #2 in the display (#2 for models that have two handsets in packaging). When you register additional handset to the base, the handset ID will be assigned. 1) Before registering the extra handset, the battery pack must be charged for 15-20 hours. 2) Place the extra handset in the main base unit to begin registration. 3) While the handset is registering, Handset Registering will appear in the LCD. When Registration Complete is displayed, the handset has been registered to the base. If Registration Failed appears, please try these steps again. Extra Handset Extra Handset Charger Charger Main Base Extra Handset + Main Base Charge the handset for 15-20 hours. Place the extra handset in the main base to register. 1 2 3 4 ?An extra handset can be registered when the main base is in standby mode. ?Standby Mode - The handset is not in use and talk/flash has not been pressed.