Apple didn’t solder RAM to their devices in 2010 +/- 1 year
The exception was the MacBook Air.
Ringtone volume is set under “Sounds & Haptics” in settings.
It’s a “sticky” setting in that, if you have “change with buttons” turned off, you have to go back to settings to adjust the notification/ringtone volume, but I’ve always treated ringtones as on/off rather than specific volume levels, because of the silent switch. I don’t ever want my phone to ring loud, so I have the volume set low just in case I happened to forget to put it in silent mode.