A: Yes, it has a TIA-1083 compliant handset, making it compatible with most hearing aid T-coils.
A: Only use the specific Vtech charger base designed for the CD111A. Different voltage outputs can destroy the battery or handset.
For a soft reset, disconnect all power, wait one minute, and reconnect.
This is often caused by interference from other electronic devices or a faulty line cord. Try replacing the telephone line cord.