We have some significant development update from our core developer furszy. He has developed a fully custom Zerocoin protocol for light nodes and it has been integrated into the newly updated mobile wallet. In addition to this, a new BIP44 deterministic key generation for single seed backup & restore of PIV & zPIV have been developed and both are now in internal testing phase. This means that full mint and spend support of Zero Knowledge Proof Zerocoins on a mobile wallet is coming soon and this would be another world first from the PIVX development team! We will keep you posted as we have further updates.