How can I cahrge my cell phone in the car when my 12v outlet doesn't work?

just fix the 12v outlet is just a fuse check on your manual on fuses and it will tell u where it is pretty sure thats all is wrong with it is like a 3 dollar fuse. thats the only way or u can carrie your 110v charger with u at all times

The only other way I could think of is if your phone has a usb charger, and you have a headunit with a usb port. then the usb port on your stereo would charge your phone. But without the cigarette lighter outlet working I can't think of any other ways to easily connect an electronic device to your car.

1)

Use the 110V home charger before you go out, it came with the phone.

2)

Fix your 12 V outlet, its likely the fuse.