Tecno had a few interesting offerings at MWC — including one of our best of MWC award winners with the Tecno AI Glasses. However, if you took the opportunity to walk around its booth, you could see a few other cool concepts, such as a tri-fold phone concept. Of course, this particular offering comes with a healthy dose of caveats. Advertisement First, the phone was under glass, which doesn't inspire a ton of confidence. There was a second unit there that a Tecno representative could show you, but you couldn't hold it yourself. Usually that means there are very few…