iPhone Downgrade Stickers. Do you have any interest in downgrading your iPhone?  First phones might not remembered as nostalgically as a first car, or that pair of underwear, but ZweiPhone stickers are a playful reminder of the days before touchscreens, App Stores and one-day battery lives. Gizmodo For that tech geek in your life that was the first one you knew to buy the iPhone, give the latest hot "trend".