MetroPCS sent out a Vine on their Twitter account yesterday that teased a release of the Galaxy S 4 for the carrier coming next week. The Vine showed a Galaxy S 3, a “+ 1” sign, and a question mark. It’s pretty obvious what they’re hinting at, especially because the device with MetroPCS’ specific radios already passed through the FCC. Check out the link below for the Vine. More details to come next week.