Check your APN settings and ensure that your APN name is redONE. To access your APN Settings, follow the instructions below:
iPhone
Go to: Settings->Mobile Data->Mobile Data Network->APN Name: redONE (or) Go to:Settings->Cellular->Cellular Data Network->APN Name: redONE
Android
Go to: Settings->Connections->Mobile Networks->Access Point Names->APN Name: redONE (or) Go to: Settings->Wireless & Networks->More->Mobile Networks->Access Point Names->APN Name: redONE
Other varying OS
Go to: Settings->Wireless & Networks->More->Mobile Networks->Access Point Names->APN Name: redONE