Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3) So I am having this issue on my 4S anybody know what the problem is? Should I return/swap? It doesn't happen all the time but say a few times a week wifi all of a sudden stops working. I try on/off under settings reset router etc still doesn't work. It fixes itself once I reboot my phone.