The heavy rubber one I have must be in Texas. Somewhere.

But for years I've just slipped the bare MR in my polo shirt pocket. I almost never damage kit of any sort, though . . .
While in the US I'd run it on a T-Mob sim and swap to the UK one when in UK. In the US I had all kinds of problems, but one day I was playing basket ball with g-daugher. Just forgot the phone and next thing it was on the drive in bits. Put it together and it worked better than ever before.
The new phone had been in the same kind of pocket less than ten minutes before escaping. Very lucky. Just dinged the edge. Case on the way.
As soon as I gain control of the new one, I'll do a factory reset on the MR and even try to download a later OS. MR really were very unpleasant about my protests - not at all usual with American companies. They wanted c $170 to upgrade the software and I had to be without it for ages. All the pundits were saying how bad the early Android was, but still MR wouldn't help.
They did in fact replace the phone 4 times but it all turned out to be the OS. I keep it because it's the clearest phone I've ever used. So I'll just use it for . . . phoning.