Like others have said, the Galaxy S10 will not be connecting to blockchains - it will store private keys with encryption. The bitcoin blockchain is just too massive to be downloaded onto a phone. However, as the Lightning Network improves, I'd like to see lite client integration with it by major providers.
whats the point of downloading the whole blockahain into a phone ? your right size is freakin huge but most importantly , most phone users will not care of that feature if ever it will be included . its already fine if the phone supports a hardware wallet because that is more important or useful than the blockchain itself . though i agree on you when you say lightning network integration because ln seems more lighter and will also be useful .