This is the biggest hurdle. Feature phones have processors clocked in megahertz, not gigahertz.
Before you spend hours downloading files, verify your device. Not every feature phone can run this specific combination. vxp angry birds 320x480 work
Not all feature phone screens are created equal. The 320x480 resolution is a specific sweet spot found in later-generation feature phones. This is the biggest hurdle
If you try to install a 240x320 version of the game on a 320x480 screen, the game will either stretch (distorting the graphics), sit in the center with a massive black border, or simply fail to launch. Finding the correct resolution ensures the slingshot physics feel right and the text is readable. If you try to install a 240x320 version