Sony Xperia 10 V Help Manual page 13

If the [Smart Forwarding] function does not work after you enable it, check that you have entered the phone numbers correctly for
each SIM. In some cases, the numbers are detected automatically during setup. Otherwise, you are prompted to enter them
manually.
Related Topic
Settings menu
Inserting a SIM card and memory card
Configuring an eSIM (XQ-DC54 only)
H-327-100-11 Copyright 2023 Sony Corporation
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