The time restriction is only for stopping text messages. I asked this question also when I put usage controls on my daughters phone. I also have chaperone on her phone and found out after I put usage controls on that chaperone does not function when time restrictions are ser. I do not see why verzion can not set the id or phone number that chaperone uses as a trusted number so that it can be used when time restrictions are set. I have also asked about adding trusted numbers that are not under my plan, but are verizon customers. I was told that it was not possible.