...also the call issues most folks report are known issues related to the Tachi dialer. If you initiate a call, then immediately try to end the call before it connects, the call will usually "hang" [meaning it will still connect the call and you may lose the ability to disconnect it]...you're best to soft reset at that point. At least, that's what I do. It only happens when you accidentially call someone...so, it's not like I'm doing this every day.

Slide to Answer issues. I've found in most cases when the Tachi dialer slide to answer becomes "stuck" or seemingly unresponsive, I take a breath, then give it a few seconds to connect the call...then I can start taking and all is well.

It's very strange, but somehow the best "fix" I've found for dealing with Tachi is patience. Any attempt to rush/force/press multiple buttons multiple times until my desired action is complete...all end in failure.