The claim is largely supported by a 2015 report by GSMA (an international consortium of mobile operators). The report does not appear to be peer-reviewed.
* Bridging the gender gap: Mobile access and usage in low and middle-income countries
The report is based on interviews, focus groups, market research and usage data from 11-35 countries.
In Figure 4.2, it shows 48% of women are unconnected in low and middle-income countries in the **Middle East & North Africa**. That is not the exactly the same as "the Arab world", but presumably is the source of the claim.
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