Increasing internal memory in LG Rumor Touch?

The LG Lotus has 80 MB of internal memory. The LG Rumor Touch has 16 MB of internal memory. How do I increase it?Increasing internal memory in LG Rumor Touch?
what you need is to get a micro sd card for the phone since that model does not have a lot of internal phone memory. they sell them in 2gb 8gb and so forth. 2gb would be plenty for that phone.