[T-Mobile myTouch 4G Slide] Blue6IX:
My recommendation would be this:

- Back up all of your personal data from the phone to a computer or something.

-Charge the battery full, then turn it off and go back to your t-mobile store.

(Give yourself an hour or two to sit there)

-When you get there, find a comfy seat near an outlet. If there isn't one, get them to make arrangements for you. There should be a seat at one of the counters you can take up for a little while.

-When you get there, tell the rep what's been going on with the phone. Power it up and do a factory reset there in the store.

-Play with it for an hour or two. Try to get it to force close. If it's happened that much, then you should know approximately what it'll take to make it happen.

-If it happens even once while you're in the store, after you've explained to them how it happens to you all the time - they'll take it back and give you a new one. (If you're within your broken-out-of-the-box window of time...what is it, 14 days from purchase?)

-Explain to them how the internal memory is corrupted somehow, must've been a bad unit from the factory. They'll just R.T.V. it. (return to vendor) for full credit, and HTC will repair it and sell it as a refurb.

-No reason for you, the consumer, to be stuck with something that isn't 100% out of the box.

-I made my phone suffer a brown-out when I drained the battery completely dead and tried to turn it on while plugged in, some funky stuff happened on the screen when I did that. (tried to power on immediately after plugging into AC with a completely depleted battery - DON"T DO THIS!@)

(If you let your battery completely drain it damages it anyway)

...I simply took it back and told them it was acting weird, and it was a no-hassle exchange for a new one.

...Really, it doesn't cost them anything but some paperwork...and they're already being paid to stand there.

Make sure you have everything it came with out of the box, and all of your paperwork & contract with you when you go to the store. Bonus points if it's the store you got it from, it'll make the whole process easier.

(you impact the margins of the store you go to negatively if it isn't the one you bought it from - but as the consumer you aren't supposed to know or be responsible for that. Still, it's easier if you go back to where it came from.)

Honestly, though, i'd just take it back and say it's acting all funky and you want to exchange it. I wouldn't even try to prove it to them in the store.

For how expensive this piece of equipment is, why take the chance?

They aren't gonna call you a liar when you show up and say it's broke, even if you can't show it right there on the spot.

Just make sure you give yourself enough time to stand there and process the exchange - it could be as short as 5 minutes or as long as an hour if there computers are slow and they're busy.

Good luck!

Edit to add - The reason why I said to do a factory reset there on the spot was to wipe your user data, if you do want to play with it in the store, make sure you do another one - without your sim card in it - before you leave.

Also make sure to keep an eye on your sim card so that you get the right one. They'll take the one from the new phone and put it in the old phone.