you use the phone to call vince and see whats in the bag but you need the shovel first
After you get the cell phone on Nabooti island you use it to dial 911
There are no cell phones (the one from Nabooti won't work). Use the phone in the motel office.
First fly from Nabooti to Giza which is at the very top of the map you get . Take out the phone and call this number. 555-6789. The director of the two guys standing in front of the maze will go into the tent to find is phone and the diggers will make a run for it.
you play Mancala
You get it when you are in the cave of mountains of the moon
if you use the phone you got from nabooti island and write any code like 411, you can a surprise!!
411,911,111,211,611,511,811,011,000,544,1112,212,122.
911
When you have the cell phone on Nabooti Island, dial 1225 and you will get a removable ELF hat and a bag of toys. (see related question)
There is one put the phone number "911" in and you will have cop clothes!!!
The Moonstone is in the bag. Call Vince on his phone and grab it. You can use it to open the tomb in the Sphinx.
you call the guy in Giza with the phone and the number that is on the shovel. Then you go to his backpack and get the moonstone, and you use it on top of the weird building/statue and it will open.