DECT 2015 Set Day of the week - Select, Set Time of day - Select Set AM/PM - Select (Confirmation sound heard) but then cursor goes back to Hour first digit, cannot get out of Menu (Setting). Press END (or leave it for 3 minutes, etc.) all go back to default 12:00A. How to set (and keep) the Time ? Please advise, thank you. t4phamvu@gmail.com Tim Pham-Vu