Is SIM A an old SIM? I had similar issues and just had my old SIM replaced with a new, "updated" SIM. Same number. I'm not sure what the provider updated, but I had better speeds as a result.
Is SIM A an old SIM? I had similar issues and just had my old SIM replaced with a new, "updated" SIM. Same number. I'm not sure what the provider updated, but I had better speeds as a result.
