Workers are getting more choice about the smartphones and tablets they use in the office, but that doesn’t mean the concept of bring your own device (BYOD) is winning out.

Research commissioned by Azzurri Communications looked at the differing adoption of BYOD, where staff are allowed to connect their personal smartphones or tablets to an organisation’s network, compared to chose your own device (CYOD) where the organisation owns the SIM or the contract, but lets employees choose their own device.

It found adoption of what it described as ‘token BYOD’ where a few lucky employees – less than ten percent – can connect their private devices to the network, had increased considerably from 42.7 percent last year to 58.3 percent this year, noting: “This is possibly more about C-level execs getting their way than anything else.”

But adoption of company-wide BYOD, where more than 75 percent of employees are part of the policy has increased more modestly, from 11 percent to 17.2 percent in a year. Company-wide CYOD has increased from 19.5 percent of respondents to 31 percent. In larger companies (with more than 250 employees) BYOD has increased from 7.3 percent to 8.4 percent, CYOD from 16.7 percent to 37.5 percent, according to the research.

However, even if it’s not corporate policy staff are still using their own devices for work purposes: when asked what proportion of employees use their private phone to access files and data, IT chiefs estimated it was an average of 15 percent, when the research found it was actually half of staff.

A similar percentage said they read work email on their personal devices every week, and more than one third said they used it for reading work documents, although the research noted that most did not want to use their personal devices as they couldn’t charge back costs to their employer and so were left out of pocket.

The average cost of introducing a CYOD policy was put at £83.66 per employee, while BYOD cost £50.63 per employee. The report was based on a survey of 251 individuals across 224 companies.