Insufficient memory with my andriod phone I have 16GB SD card but I still get the message insufficient memory when I want to download any app.
The issue is that apps aren't by default stored on the SD card. The SD card is for extra data like music/videos/downloads etc.

You can however move existing apps to the SD card most of the time (some apps don't allow that). You go to Settings > Apps and pick from as many apps that are large (the list should have a filter for this). After selecting an app you can often click "Move to SD" or something similar.