carrying the blockchain on a mobile phone is not what most people would consider as portable, just chewing up to much space. Is there anyway for 'average Joe' to carry a shortened block chain or transactions of the chain without the need to have a degree in computer science?
Why the average Joe will contain the whole blockchain on his phone ? We have online wallets for mobile use. Its like having a few notes in your wallet for daily use. Some more can be kept at your computer's hosted wallet. That is like having some more notes in your almirah for weekly/monthly use. The rest should be kept at cold paper wallet. That is your bank balance.