How to enable Call waiting service in Samsung Galaxy Grand2(SM-G7102)?
STEP 1. GETTING STARTED
a). Tap on Apps icon as shown below.
b). Now tap on Settings and then tap on Device as shown below.
STEP 2. ENABLING CALL WAITING
c). Tap on Call option as shown below.
d). Now, tap on Additional settings as shown below.
e). Tap on the Check box next to Call waiting option and enable it as shown below.
NOTE : Enabling Call waiting will notify you of incoming call when you are on call.
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