It's next to impossible to reach me directly by phone.
I have problems shifting attention, so it's very difficult to suddenly answer the phone, shifting attention to the call/caller.
I often have calls go to voicemail and I return them. People can reach me directly if we text first and set a time to talk and I can then be totally available to the call.
When I am very depressed, I do not return calls very quickly. I often do not want to "chat" much.

WC