4 ms·

Nowadays you can use also use the built-in modem: open the telephone app and type this: *3001#12345#* then tap Call

• j88439h84 6y ago
  What does it do?
  • dylan604 6y ago
    https://lmgtfy.com/?q=*3001%2312345%23* https://lmgtfy.com/?q=*3001%2312345%23*
  • joshstrange 6y ago
    iPhone’s “Field Test” debug screen: Dial 3001#12345# for the real signal strength [0] [0] https://ma.ttias.be/iphones-field-test-debug-screen-dial-300112345-for-the-real-signal-strength/ https://ma.ttias.be/iphones-field-test-debug-screen-dial-300...
    • snazz 6y ago
      It doesn't allow you to replace the signal strength indicator anymore, unfortunately (you have to check the strength yourself). Although it now supports dark mode!