Will a cell phone jammer be helpful for control the kids' phone time ?

This was two months ago but I see there are no responses so perhaps you're still looking for input. Briefly, NO, it won't be helpful.First, if you're in the US, be aware that signal jamming devices are illegal. This doesn't mean no one will sell them to you. Make sure you're not running afoul of any laws where you may live =)Secondly, and more to the point, isolating kids from temptation will not teach the discipline they need. Explain the problem, set boundaries, and lead by example. Perhaps set aside a block of time every afternoon for studying with no cell phone use allowed. Do not allow cell phones in bed. Have the kids help decide what the consequence will be if they break the rules.It's key that you talk to your kids openly about why excessive time spent online is damaging to their studies, their health, and your family as a whole, and that you be mindful of your own behavior as you model "adulting" for them! Best of luck!!