You need to go through the pairing procedure to prevent other smartphone users from accidentally controlling your hearing aids. Whenever you power up the hearing aids (by opening then closing the battery door for most hearing aids), the hearing aids are in the pairing mode for the first 3 min. On the app home screen, press the menu icon in the top-left corner, then “New pairing” and follow the simple steps. 3 min is plenty of time to complete the procedure.