The gang members, aged between 37 and 57, had various roles in what the prosecution said was a “highly efficient” drugs supply conspiracy.
They would work shifts to hold and operate the graft phone.
Police estimated the value of the conspiracy to have been between £540,000 and £626,000.
This was based on activity on the graft phone and the amount of cocaine that had been found at various addresses.
All eight pleaded guilty in June 2025.