For whatever reason, something might go wrong with your Galaxy Note or Galaxy Tab. When things get really tough, you'll need to contact either Samsung itself or your cellular service provider. Here are their contact numbers and websites:

AT&T 800-331-0500
Sprint Nextel 800-211-4727
T-Mobile 800-866-2453
Verizon 800-922-0204
Google Unavailable
Samsung 800-726-7864