Ah - yes.. I'd forgotten that.. And it begs me bring up a very old mystery I need solved. I have had that outgoing text tone nearly disappear without ever deleting any files in the past.. but when it's barely there so are any of those alert tones and Siri's voice etc.. barely hearable. Though it's not well known, because it's a hard thing to isolate - ever since iOS5 there's been a SEPARATE volume control for certain internal sounds that does NOT get affected by the main volume knobs on the side of the phone - nor is it changeable in the Ringer and Alerts volume setting in Settings-->Sounds.
I've had the situation where the ringer volume is full up and I can't hear Siri or text tones barely at all. Until - in the middle of a Siri talking section - when I can catch it accessing this 'other' volume state, you can hit the volume knob on the side and you'll see a graphic come on the screen of a volume fader WITHOUT the words "Ringer Volume". Since texts alerts (that are also affected separately by the Ringer Volume setting) are so FAST, it's hard to catch them in a changeable state to turn them up. It's like an isolated volume state separate from Ringer & Alert volumes. SO - if you have this "extra volume" set all the way up and Ringer & Alerts set all the way up, that's the max you'll hear alerts and Siri volume. But if you have this "extra volume" set to near zero and Ringer & Alerts sets all the way up - you can barely hear alerts and Siri.
Has anyone else been able to isolate this "other" volume control that doesn't have the words "Ringer volume" under the read out? I'm pretty sure it's still in iOS7 and A7 devices since my text tones, right now are barely hearable and yet my ringer volume is all the way up.
Any thoughts, Willerz?