Some international carriers don’t support Unicode characters. Use plain text for guaranteed delivery.
Yes — you can log in with the same credentials on several devices. Just note that active calls work on one device at a time.
This is a network-level message from the recipient’s carrier. Retry later or verify the number format.
This typically happens under weak Wi-Fi. Close background apps, switch to stronger data, or enable “HD Voice” in your settings.
Yes, most carriers support port-in requests. Contact support with your current provider details to start the process.
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