iPhone 7 may be the cause of no Voice Ringtones and also no loudspeaker calls. then we can not use the loudspeaker and we can not play the ringtone cause ringtone ring ring ring can also below. For iPhone 7 Ringer Solution Bridge Problem Solution Ways use the diagram below.
If there is any water or rust damage on the base plate, then clean with electronic air cleaner for hot air for a few minutes of mint so it can be dry. Check the ringer point after opening the mobile. if ringers point is not working and its value is not right then replace it with new ringer.problem will be problem resolved. if it will not solve then check the ringers point Onboard. If there value is not to the right then check the parts and components with the path there from the diagram above. If missing some path then apply the bridge. If any part and components are not working, replace it with a new one.