Uniden 2.4 GHz cordless phone won't register to base

This sounds like the handset has lost its "registration" with
the base. De-registering & re-registering is often easy.

First, be sure the handset battery is well charged as a
weak battery will interfere with the registration process.
Then try this ( 'works for the D1680, D1481, & similar):

To deregister the handset:

1. Press and hold the [END] and [ # ] keys at the same time,
after a few seconds the display will say
"System Reset, Deregister Handset"
press [SELECT]
scroll to "Base Unavailable"
press [SELECT] (chirps) press [END]
display reads "Place in base..."

Next, to re-register the handset:

2. Set the handset into the base cradle and wait,
within ~30 seconds the handset should display
a "Handset #" and be good to go...

Good luck!
--------------

you can contact the service provider...............

Often the handsets must be re-registered when they won't work. Sometimes they have to be de-registered, then re-registered before getting them to work. Uniden has many different model number 5.8 GHz cordless phones, send a comment with the model number and I will give specific help on your cordless. I have included a link where Uniden cordless manuals can be downloaded if you need it.

http://www.uniden.com/index/manuals_results.cfm?cat=1

Press & hold power & * keys all at once. 5-10 secs. Try it. I dare ya. Then ya can register or de-reg etc

The DXI4286-2 is an Analog phone, it does not allow for both handset to be used at the same time. You can transfer a call from one handset to another, but cannot talk on both at the same time.
The following is from the user's manual for your phone:

Unavailable message is displayed
on the LCD screen of the
handset.
• Make sure the other handset is not already in use. Both handsets cannot be in talk mode at the
same time.
• Place the handset in the main base for at least 5 seconds to re-register to the main base.
• Make sure the handset is not too far from the main base when trying to use.

You might want to try one of the DECT or a Digital 2.4 or 5.8 GHz phones, they allow you to use multiple handsets at the same time.

Did you pay the phone bill? Plug in the phone cord? Ive seen people do it and say" But It's cordless I shouldn't have to plug it in ...Right?""

It may not be registed with the main unit. You may need to register the handset. With my uniden all i have to do is put it in the main base until it says what handset it is (it should be a number).

If you have any questions please dont hesitate to ask

I put the phone on the master handset (I registered it)

Same manual as lethean provided on a similar post but Page 24 if the previously used Base is Unavailable and your phone shows "Deregistration" in the Menu.

Base Unavailable (Handset Only)
To clear the base registration data in the handset, please follow these steps:
Press and hold [] and [#] for more than 5 seconds. Select the BASE UNAVAILABLE submenu.
BASE UNAVAILABLE appears. Move the cursor to select YES, and then press the OK soft key.
ARE YOU SURE? appears. Move the cursor to select YES. Press the OK soft key.

To register the handset:

1. make sure phone is charged
2. hold down the "mute/program button on the phone 10 seconds.
3. you should see a message on the screen that says you need to push the "pager button" on the handset.
4. Push the pager button