What does it mean to buy a fund and send a net value of 1.000 by SMS?

That's a text message prompt for net worth update.

If the net value when you buy a fund is 1.000, then the net value prompt is 1.000. If you don't calculate the transaction cost, you won't lose money or make money. If the net value when you buy a fund is less than 1.000, then you will make a profit at this time. If the net value when you buy a fund is higher than 1.00, then you are now in a floating loss state.

Fund companies send text messages to update their net value, which belongs to the service of fund companies.