BT advanced - Registration failed.

Yussie — Thu, 27 Aug 2026 16:10:41 GMT

I have a BT advanced unit and 5 connected cordless phones. The base unit has been playing up, so I bought an identical one (with an extra phone). I registered 4 of the phones with no problem, but 2 of the phones showed 'Registration failed'. I used the new phone in place of one of the failing phones and now have 2 spare phones but neither will register for my last phone.

I am aware of REN problems, but they all worked with the old base unit.

I tried to de register one of the phones, using the old base unit, but that had no effect. I have reset both phones, taken out the batteries for 5 minutes but still no luck.

Any ideas how I can register my last phone?

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BT advanced - Registration failed.