Yes, but ClearCaptions strongly advises you to dial 911 directly using a landline phone or TTY (TeleTypewriter) rather than dialing through the ClearCaptions Mobile app. Dialing 911 from the standard Public Switched Telephone Network (PSTN) remains the most reliable and fastest method for reaching emergency response personnel. Internet or wireless networks do not function in the same way as PSTN. With the standard telephone network, 911 centers have the ability to identify the location of a specific incoming phone number, whereas calls made using the Internet cannot identify specific locations to the PSAP.