WhatsApp is the most-used messaging and social networking platform these days. But, WhatsApp is constrained to smart phones and you cannot use it on most tablets and all PHS as yet. positive 3G Android tablets which will let you make Smartphone calls are the best ones that could use WhatsApp for now. The iPad and iPod contact, even though they function 3G SIM card slots for the internet, cannot have WhatsApp operating due to incompatibility with the tool. You can get online college paper writing service here.