Wireless 20/20.com is suggesting that 4G operators can boost average revenue per user ROI by offering VoIP as well as data services.

The independent market research and consulting company, which is focused solely on the emerging broadband wireless market, said many operators could see improvement in ROI by deploying cloud-based delivery solutions as compared to managing in-house VoIP platforms.

Launching 4G VoIP service will add 25 to 50 percent to annual revenue per user, according to Wireless2020 .

4G operators should offer a suite of value-added services to get  subscribers without losing market share to competitors, Wireless2020 said.

“Operators deploying VoIP over 4G networks are faced with a critical decision as to whether they should build and manage an in-house VoIP platform or partner with a cloud-based, hosted VoIP solution provider,” said Haig Sarkissian, principal consultant of Wireless 20/20, in a statement.

“We found that although the average VoIP revenue contribution per end-user is largely the same, the investments needed and the ROI vary drastically depending on whether an in-house approach or a hosted solution is used,” Sarkissian added.

VoIP solutions provider netTALK announced Monday that it has acquired a 23,000 square-foot data center in north Miami. Dubbed the netTALK Cloud Center, it will serve as its headquarters.

Featuring redundant power design and maximum connectivity for wireless 4G, the facility’s tenants include Sprint, Florida Power and Light, Qwest, AT&T, Verizon and Vodafone.

“The netTALK Cloud Center marks a major step in our evolution as a company,” Anastasios Kyriakides, netTalk president and CEO said in a statement.

“Building on our recently-announced multi-year wholesale agreement with Lightsquared, this state-of-the-art facility provides us with additional capacity, power efficiencies and equipment such as a high-bandwidth antennae, which are key to our strategic growth plans, current and future, including television and wireless 4G transmissions, and B2B services within cloud hosting, network operations and other data management services,” he added.

netTALK offers a digital phone service that connects directly to a modem or router.