I found a report dated May 22, 2014
Geek Squad reactivating Lock n Found app.
Seems legit. My payment got messed up after my bank issued my a new debit card during that Target security scandal.

How did you find out it was geeksquad?
I'm looking it up right meow.
(Did you see what I did there? Meow instead of now. It messes people up. I have a cat. Dont judge me)

The same thing happened to me. I was biking and have been known to inadvertently open unintended applications. But this bothered me quite a bit more.
What combination of menu items would have delivered this message? Not to mention,  3394991625 is not in my contacts making the process even more difficult

I have seen an identification of this number as being the GeekSquad Locked&Found app of BestBuy. That makes sense to me because I signed up with them and got two text messages from this number shortly thereafter. It's a shame they don't identify themselves positively in the message instead of just giving a number, because seeing a phone's IMEI number in a message from someone else can be very startling. In fact, that's why I looked up the number, to see if anybody would identify it as some evil scheme. It doesn't seem to be, unless you regard GeekSquad as being an evil scheme.

I noticed a text message sent to the number ,Noticing my IMEI number . and more info from my phone.

Yup- definitely getting OK almost every hour...

I received random texts of "ok" with every hour on the hour.
How can I stop.it?

everytime my phone dies and i turn it back on i have a new message and all it says is "ok" so i would also very much like to know. it's been happening to me for the past 2 weeks or so

I've gotten at least two text messages from this number that just say "OK"