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Hi @Tashi-2020,
Welcome to the community!
We did an article that you may find helpful, this will guide you a basic troubleshooting related to mobile call issues.
See link below.
Troubleshooting issues with Incoming/Outgoing Calls on TPG Mobile.
Let us know how it will go.
Cheers!
My sim is active but I couldn’t call. Just showing SOS only