Upgrading memory without an expansion card

Say you don't have a smartphone, but you want to use a memory card to hold photos you've taken with the camera. Can you expand the memory? Not unless you have a cutting-edge phone. Some of the latest non-smartphone cell phones have mini-SD slots or Memory Stick slots. These include models from Nokia, Motorola and Sony Ericsson. But these phones are new, expensive and sometimes not even available yet in the US.
If you want to upgrade your phone's storage capabilities without buying a new one, you are pretty much out of luck. If you look around the Inernet enough, you can find services that promise to upgrade your phone's RAM. But you'll void the warranty as soon as the phone is opened by non-authorized personnel. And it would probably cost close to what it would for upgrading your phone anyway.