Mobile network not available
So I just switch from cricket wireless yesterday to at&t prepaid. And now have been having issues with service. I get a message on my phone, a OnePlus 5T, that says No data service temporarily not offered by the mobile network at your location. I had great service before with cricket at my work and now nothing. Last night I also had no service at the bowling alley which was fine in the past. I don't know if the guy at the store put the wrong number or info when he was setting up my account. Any help would be appreciated.