Samsung SM-J700P User Guide - Page 69

 The selected message will be delivered to the caller.  You can edit the reject messages through the Call settings menu. From the phone app, tap More > Settings > Call blocking > Call-reject messages and edit or create the reject messages. In-Call Screen Layout and Operations While you are on a call, you will see a number of options. In-Call Screen Layout ■ Tap options to activate them during a call. ● Add call: Touch and hold to initiate a conference call (3-way call). ● Extra volume: Increase the call volume. ● Bluetooth: Route the phone's audio through a connected Bluetooth headset (On) or through the speaker (Off).  When the call is routed to a Bluetooth headset, the current call area shows the Bluetooth call icon ( ). Note: The Headset button is activated to show the current call is routed to the connected Bluetooth headset (not included).  To route the current call back to the phone, tap Headset to temporarily use the phone. Tap it again to route the call back to the connected Bluetooth headset.  When Bluetooth or the Bluetooth headset is turned off, the call is routed through either the earpiece or speaker and shows Bluetooth . ● Speaker: Route the phone's audio through the speaker (On) or through the earpiece (Off). Phone Calls and Voicemail 59