Originally Posted by
gfunkdave
Field test mode is still there. I think they removed it in one version of iOS but it's been back for years now. Just dial *3001#12345#* <call> like always.
With my 16 pro it doesn't show as much as it used to, but still shows the basics

Ah, I did not realize they put it back. Yeah, that was the same way it was accessed back in the day. Another thing they removed around the same time was the ability to see the actual signal strength (RSRP) on the home screen as opposed to the 5 level antenna icon.