The 64GB Moto X has popped up a few times in Motorola's site code and in some leaked Sprint docs, but now it's official. Motorola has confirmed to us that the 64GB Moto X is going to sell for $100 more than the 16GB model. The company is also starting a one-day promotion at 11PM CT on Sunday June 8th that lets you try a custom Moto X for two weeks.

The 64GB model hasn't shown up in Moto Maker for us just yet, but it's going live when the trial program does. The 64GB device will be available on AT&T, T-Mobile (unlocked), Sprint, and Republic Wireless. There's no mention of Verizon in the statement we got (see below), so apparently Big Red customers will have to settle for 32GB.

As for this trial program, you'll be able to design and order a Moto X and pay just $0.01 up-front. The device is shipped out and you get to use it for up to two weeks. If you like it, keep it and pay Motorola the agreed upon price. If not, box it up and send it back, no questions asked. If you keep the phone, you'll also get a 30% off promo code to spend on accessories. Unlike some of Moto's recent deals, this one is subject to limited supply, so plan ahead.