Windsor Holden, the report co-author, said: "As the industry moves more aggressively into a 4G/LTE environment, telcos risk undermining any revenue actually earned from value-added services by continuing to not invest in appropriate business support systems.

"Despite their initial costs, revenue assurance and fraud management systems demonstrate a strong case for return on investment."

Meanwhile, roll-outs of 4G technology in the UK are being stalled by between operators and industry watchdogs.