If the former group owner violated the rules
( including invalid phone number ) or deleted
the account, the group ownership would be lost
and automatically transferred to the most
qualified group admin.
When the former owner back to imo, he/she
may negotiate with the existing owner about
ownership transfer.
For official hosts, you may contact your admin
or recruiter to retrieve or apply for the group
ownership.
Tips:
Never transfer your group ownership to others.