Not too easy to find belt cases for a phone as new as the L900. But the good news is that there are a bunch of phones about the same size. The L900 measures; 127.8mm x 68.5mm x 11.5mm. Compare that to the Motorola Droid X at; 127.5mm x 65.5mm x 9.9mm or the Droid Razr Maxx at: 130.7mm x 68.9mm x 9mm. I decided to do a search for an HTC Rezound (129mm x 65.5mm x 13.7mm and found this case sold by Klemson on eBay.
Nothing special here, but the Lumia does fit nicely even with the thin gel case protecting my phone. Belt clip is your standard stiff spring with swivel. I am a little disappointed in the magnetic flap as it does not hold all that well and can easily be opened by brushing against it. Fortunately the L900 stays put even if I try to shake the phone out of the case. Not sure if the phone could fall out more easily if it were naked.
At $7.87 with FREE shipping I don’t have much to complain about. I have been using a horizontal case since last Friday, but as I am always afraid the phone will slip out from between my two fingers griping the face and back, I really prefer a vertical case where I can grab the sides of the phone tightly. I also ordered a nicer Naztech ($19.99) case and expect to see that by the end of the week. So this guy may get delegated to backup duty shortly.
If you are looking for a cheap case to protect your L900 though, this will work.