CBS 11 reports the issues with Plano, Rowlett and Garland 9-1-1 service, whether cell or landline, have been corrected. #UPDATE: 9-1-1 service has been restored for @TMobile customers. — City of Plano (@cityofplanotx) July 31, 2017 We are pleased to announce the problems with 911 calls regarding mobile phones have been resolved. All emergency systems are back to normal. — Garland Police PIO (@GarlandPD) July 31, 2017 The 911 system has been repaired. All phone lines, cellular and land, are working properly. — Rowlett PD (@Rowlett_PD) July 31, 2017 Click HERE to learn more about what was happening.