For All incoming/ outgoing call mode, Set your iPhone call on speakerphone or headphone by default. Setting option for set call types mode very useful for handicap, Driver and Business owner who Make call directly without change mode whenever He/ She do call or receive incoming call on iPhone. For updated iOS 8/ 9 device setting options changed from previous iOS 6, iOS 7. Follow the below steps on how to change or update Call audio routing from automatic, Bluetooth Headset or Speaker mode.
Steps on Change/ Set iPhone call on Speakerphone/ Headset mode: iOS 9, iOS 8
Automatic: Automatic iPhone call mode, Always use default speaker. After that you have to change calling mode, Headphone or Speaker.
Bluetooth Headset: Directly start call on connected headset or wireless speaker, when you receive or make call from iPhone.
Speaker: Incoming or Outgoing call use loud speaker, Always. After that you can change (Turn off speaker mode by tap on Speaker)
Default option from apple is automatic, But depend on circumstances you must change setting depends on device you have. If you have headphone then choose second option.
Step 1: Go to the Settings App on iPhone.
Step 2: Next, Tap on general > Accessibility.
Now, Choose prefer option for incoming or outgoing call mode. Through which device or way are you using default for all calls?
Can I change default call mode after receive or sent call (incoming/ Outgoing)?
This settings widely use on conference call, or on live stream for large audience or crowd. Also know your crazy friends who can get idea about how set iPhone call on speakerphone or Wireless Speaker/ Headphone, by default.