No instructions came with my U.S. tamagotchi mini - and I don't think any needed to either. I can explain it to you quickly, as it's such a small tamagotchi and you can hardly do anything with it. But they're good for tama collections - or you can use them as a little digital watch keyring.
When your mini is awake, you can:
Press button 'A' and if your tama is hungry or has pooped, you can clean up it's mess and feed it a snack or a meal - but if it hasn't pooped, and isn't hungry, nothing will happen if you press button 'A'.
Except for that, the only thing you can do is press button 'B' to see the time. (it dosen't tell you the date though)
When your mini is asleep:
You can only turn the lights on/off, and see the time. And that's all.
Edit: Like other tamas, you can turn the sound on/off like you would with a V1, V2, V3 or V4. And you can pause it the same as the other versions too - but when it's paused, it won't say 'Pause' underneath it. Instead, a '!' will appear above it's head.
^So, not alot it can do, but still, it's pretty cute!
-sk8er girl-