If your phone connects to a Stringray device, it will force it back to older protocols afaik. Also: https://www.zdnet.com/article/stingray-security-flaw-cell-

If your phone connects to a Stringray device, it will force it back to older protocols afaik. Also: https://www.zdnet.com/article/stingray-security-flaw-cell-networks-phone-tracking-surveillance/ https://www.zdnet.com/article/stingray-security-flaw-cell-ne...