Im with you dunn... I believe that Phones should be treated as Hardware and not just an emissary of overpriced carrier services.. its honestly gotten alot better over the past few years. can you imagine an iPhone with a At&T logo under the front glass and a "4G" icon next to The Apple on the back.... i think not... J.Ive, would have thrown a fit..
Luckily we have now networks like "cricket" and other prepaid services that will allow you to BYOD.. but does it really mean we own the device..
You wouldnt ask DirectTV to provide you with a television right... you get my example..
I think the Carrier snobery is best exemplified in the Lumia Icon Release... look at it.. everywhere else it is known as the Lumia 930, yet Verizon, with its brand image, Slapped its logo Everywhere on the Front and back of it, and Restricted Lumia Colors to Black and White Only. Yes Verizon got it first.... but it didnt have to treat the hardware with Bloatware and Branding, the firmware for it does not even have the "peek" option.
I believe that Carriers are Still holding on to the perspective of "the phone is just a way for consumers to access our services". and that if consumers want our serivce they will "update" their hardware every 2 years. which is why we see a blatant disregard for OEM firmware updates and design choices. Consumers now are more savvy and self conscientious when it comes to smartphones, as such, OEMs such as Nokia, Apple, Samsung, LG. have a vested interest, to interact with consumers directly and protect their brand. because now people don't just say, I want a phone on AT&T. They say, "i want an iPhone", or "I want a Lumia" etc..etc...
If the 620 were available on other carriers, we probably would have gotten Black and other updates sooner, but since its an "exclusive" to aio, they could have done as they pleased, luckily our Hardware RM-846 is the same everywhere else, so firmware flashes are easy.
I have thought about looking at the aio ROM to see if i can extract the sound files, but i wouldnt know were to begin with that, seems encrypted.. maybe just try and send the files via email from a aio display phone in a store, to your current phone.. maybe that would work..