No Mom, cell phone use during school doesn't harm your childAaron Baker - Editor-in-Chief
Video games were a different story. Those that allow children to learn visually based on pictures and images boost scores in Science, Technology, Engineering, and Math are fine, however others can lower performance. Professor Linda Jackson, author of the report, admitted that children aren't going to stop playing video games anytime soon - rather, she advocated that video game developers work on creating games that are centered around visual-spatial skills and not on violence. Additionally, more games need to be tailored to girls, in order to equally boost their visual-spatial skills.
On the mobile phone front, one caveat still remains: further research is needed with older children who may engage in "devious behavior" (we like the word 'tomfoolery') such as text messaging, or using the device to cheat.
Source: Tech Radar