I accidentally found a life hack on how to put a call on hold. It can be useful if you want a person to wait for a while, listen to music while you are busy. There may be other uses, you know better.
- Start or accept a call.
2. Press the icon for 5 seconds "Mute":
3. The call is put on hold.
How to activate call hold on iPhone
Starting with iOS 7, the hold button in the call mode has been removed and now to activate the call hold you need to press the key “Off sound" and hold it down for a few seconds.
After 3 seconds, the key will change to the usual button “On hold”.
After performing these steps, your interlocutor will hear background music or the phrase: “Stay on the line, your conversation will continue". The text of the automatic message may vary slightly depending on the service provider.
To disable call hold, press the "on hold" again.