If you don't want Google to identify spam callers, touch   >   > Settings > Caller ID & spam and turn it off 
.
Turn call waiting on and off
When you’re on a call and a new call comes in, the new call is sent to voicemail. If you want to be notified of 
new calls instead, turn on call waiting.
 
Note: Some carriers automatically control call waiting. If you do not see this option on your phone, 
contact your carrier for more information.
To turn call waiting on:
1.
Open the   Phone app.
2.
Touch   > Settings.
3. Do one of the following:
•
If your phone has one SIM, touch Calls.
•
If your phone has two SIMs, touch Calling accounts and select the SIM.
4.
Touch Additional settings, then turn Call waiting on  .
When call waiting is on, if you're on a call and a new call comes in, you can answer it. The first call is put on 
hold. Touch   to merge the two calls.
To turn call waiting off, go to Additional settings, then turn Call waiting off 
View and delete call history
See your call history
To see all recent calls:
1.
Touch  .
2.
Touch  .
Contacts, calls, voicemail : Phone calls
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