Could someone tell me when POS wallet will start?
There is no official date yet. We are in close contact with the LEOcoin development team and will post any updates about POS as soon as possible.
Someone wrote that the POS wallet is in a testnig mode and will be lunch soon on the market? Is it that true?
Yes, the LEOcoin development team is working on the changes both with regard to the probable change to a solely POS mechanism, as on the wallet.