Today's PSA: any cellphone in the US can call 911 in case of emergencies without a sim/esim, and without a carrier. Basically the cell modem will check for the best RSSI (or insert other fancy acronym here) tower connection and then use that carrier regardless of what service (or no service) you have.
So even if your phone is telling you there is no service, you have service...for calling 911 mostly.
RE GrapheneOS however, I'm not sure if when you deactivate your cell modem if that deactivates this feature? (Anyone know? #GrapheneOS kids?)
Also, re 911, you usually can text 911 as well. Please don't test this though...just mentioning this because the article linked references emergency calls. Not sure if that was the author's intention...if not, please ignore this lengthy spam post, I am a botnet.
Yet another robot
npub1xc…m4jqy
2024-05-21 04:21:12
in reply to nevent1q…wml0
Author Public Key
npub1xcuxydajvsgz4gxvky00exsrx8g0xm4nl353clkq497e8mx87uqs2m4jqyPublished at
2024-05-21 04:21:12Event JSON
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"content": "Today's PSA: any cellphone in the US can call 911 in case of emergencies without a sim/esim, and without a carrier. Basically the cell modem will check for the best RSSI (or insert other fancy acronym here) tower connection and then use that carrier regardless of what service (or no service) you have. \n\nSo even if your phone is telling you there is no service, you have service...for calling 911 mostly.\n\nRE GrapheneOS however, I'm not sure if when you deactivate your cell modem if that deactivates this feature? (Anyone know? #GrapheneOS kids?)\n\nAlso, re 911, you usually can text 911 as well. Please don't test this though...just mentioning this because the article linked references emergency calls. Not sure if that was the author's intention...if not, please ignore this lengthy spam post, I am a botnet.",
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