iPhone 11 Pro doesn’t work on Full signal bar connection.
iPhone 11 pro will lose data connection for all apps/services while the signal is showing full bars. Switching off and on cellular data or airplane mode won't fix.
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Try this:
- Remove and reinsert the SIM card.
- If it doesn't help contact your carrier, maybe the SIM card is damaged, ask for a replaced (new) card. Normally it is free.
- Als ask to check if the SIM tray is bent, as even a tiny misalignment can cause the SIM card to not fully connect with the internal contacts in your iPhone.