Google’s already indicated that tablets and smartphones won’t be sharing the same Android build until Ice Cream Sandwich in Q4, though interestingly enough, it turns out that the tablet-friendly Honeycomb actually has Gingerbread’s interface quietly tucked underneath. According to modder Graffix0214, all you need for making the jump is one simple tweak in a system file: assuming you already have root access, use your preferred method — Pocketables recommends the LCDDensity for Root app — to change the LCD density value to 170 or higher to emulate a smaller, denser display.
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