I have tried to contact Slingshot Communication, Inc. by email and phone. They never answer their phones or email. I have a wireless modem from them that can be "recharged" with a credit card for more airtime. Their online credit card "recharge" system doesn't work. Not being able to contact them, I don't know whether they've "flown the coop" or not! Their direct phone line is always busy. Their "tech" line is always busy. Arizona BBB doesn't have anything on them, so I'm in the dark about their existence. read full review »