The OnePlus One is a great handset from what we can tell based on reviews and its hardware specs. However if there’s one thing that marred this otherwise great phone is the fact that it is so hard to get your hands on one. This is due to the weird invitation-only system that OnePlus has in place to ensure that they are able to keep up with the demand for the phones. That being said, it seems that OnePlus could be teasing some customization options for the handset. In a recent Twitter post by the company, they teased “Knock on wood” for the 22nd of July. It is unclear what this could mean, but some have speculated that it could mean that a wooden backplate option for the OnePlus One could be announced then.