Not registered i have the binatone G11 twin une phone working another on screen said not registered and no working

Hello there i think this is because you need to register the second handset with the base here are the instructions

REGISTRATION
Registration links the base to a cordless handset. Once a handset is
registered it can use the base’s phone connection. A cordless handset will
not operate until it is registered to the base. During the registration
process, keep the handset near the base.
1. Press the flash/program button on the base until LINK HANDSET shows
in the display. 2NO is the default setting.
2. Press the 1 number key or press the MESSAGES/CID (
or) button
on the base to scroll to 1YES.
3. Press flash/program to confirm handset is linked to the base. WAITING
HANDSET REGISTRATION shows in the display.
4. Press the flash/program button on the handset until LINK BASE? shows
in the display. 2NO is the default setting.
5. Press 1 on the handset keypad or cid/vol (
or) button on the
handset to scroll to 1YES.confirmation tone when the handset is successfully linked to the base.
6. Press flash/program on the handset again to confirm. You will hear a long

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