I need to order a tip for a Samsung Galaxy and a HTC Evo

According to my information, both Samsung Galaxy and HTC Evo use the Micro USB tip included with the Charge4All system. Unfortunately, many comapnies are still making their own version of Micro USB cable that is not yet standardized.  HTC particualrly mentions on their website to only use their cord.  If the Micro USB tip included with your Charge4All system does not work, we do not have an alternative.