Tevion 1000?

Tevion 1000. The date and year is set correctly, but messages indicate the wrong day

how can ifix my bt phone 4600?

my BT4600 keeps saying mail box full ( its empty) it wont answer but rings out

Blank screen bt4500?

My by synergy 4500 screen has gone blank it lights up when the dial tone comes on but no info is displayed

unlock synergy 5500?

Hoe do I unlock my handset Ihave tried pressing the hash key.