The Vertu Aster P like all other Vertu phones is handmade in England, Each phone is built by one craftsman and his signature is engraved on the phone. The Aster P has a grade-5 titanium frame and the display is covered in a single piece of 133-carat sapphire crystal glass. Titanium is twice as strong as steel but weighs much less and sapphire is next to diamond when it comes to hardness.