Depending on whether you're trying to fix a reception issue or send a text with no signal, you can manage your iPhone's reception and messaging through the following methods: Checking Precise Signal Strength

: Enable this in Settings > Cellular > Wi-Fi Calling to send traditional SMS (green bubble) texts over a Wi-Fi network. Troubleshooting Poor Reception If your iPhone isn't receiving texts despite having signal: Connect to a satellite with your iPhone - Apple Support

This opens a hidden menu showing your signal strength in (decibel-milliwatts). A number closer to zero (e.g., -50 dBm) indicates excellent reception, while -110 dBm or lower indicates very poor signal. Texting with No Reception (Satellite)

For a more accurate reading of your reception than standard bars, you can use : Open the Phone app. Dial *3001#12345#* and press Call .

: You must be outside with a clear view of the sky.