I’m using a Galaxy S9+ and I am unable to text a short number, says Service Access Denied no matter what short number I use. Also when I need to receive a code to verify my identity with other companies, the code never shows up. Only the microsoft authenticator will work and that’s because I had to download the Microsoft Authenticator app to do so. My Premium text and messaging service is set to “always on” and always has been. Now I’ve decided to find out why. Is there something on T-mobiles end that needs to be done? I asked a representative and she said it has to be done in settings. What other setting can there be besides the premium service setting I already mentioned?
Best answer by syaoran
You need to contact Customer Care and have them enable short codes on your account. If your account is a prepaid account, some of those short codes to verify who you are might not work because there is no Social attached to prepaid accounts.