A bit difficult to explain that but in my opinion if this must not be real. i won't believe such claim until there will be a proof. Remember that full nodes must also online anytime. How long will you keep your phone to be online to run your nodes? Im always using VPS for that. VPS is the most capable thing run to full nodes. I remember when a coin called pi coin claimed can make mobile to be used to mine coin in the past. What important to run full nodes in mobile?