Dear friend, there is certainly a feature / option in the phone configuration.
I own Alcatel 2012 and I find this option in the configuration, so please review your phone settings carefully.
I can't help a smarter colleague.
If somewhere on the side wall there is a button on the friend's button to increase / decrease the volume, please be careful about it, because when you press carelessly when the phone rings, it may cause rejection of the conversation.