I have a Samsung s105 that is about one month old. I've noticed that when I turn it off at night now, everyonce in a while the phone will change every number I have programmed into a cell phone number designation (i.e. a number stored as a home number is changed to a cell phone number). Has anyone seen this problem? Numbers stored both on SIM card and phone revert to cell designation. Any info on this issue?
I've also experienced this problem and share your frustration, especially since I have many contacts with multiple numbers! Before losing your information, had you updated your firmware or swapped-out SIM cards? Those are the only two things I've done which can be considered "out of the ordinary." If I find an answer, I will post it!
I have this problem too. I also notice that my Caller Groups have been emptied out. I have to add entries into my Caller Groups every time this happens. Very annoying.
I had that problem too, when I used T-Mo's website to input and manage the phone numbers. Once I stopped using the website and input phone numbers directly, my numbers "held". I don't know if this is the problem with you guys, please let me know.