RTT keeps causing toll free numbers to hang up on me it won't communicate when I've pressed my numerical option i.e press 5 for ....and I can't get it to stop coming on even though I have disabled it. Turned off all RTT buttons. It also automatically starts RTT when making any call and then you have to press voice only call but people hang up by then because it lags, it takes 2 minutes or more with the person saying Hello.... please fix the developer suggestion didn't work FYI already tried it.