The feature has been disabled in the software. I've tried to do some searching on it and it seems that this is not a carrier thing.
You can jailbreak it and download the app yourself, but as of right now I can't find anything.
Could you maybe change the title of the thread, please? A "How To:" title would be instructions on how to actually do it. a "How To?" title would be a question for others to tell you how to do it. See the difference?
Could you maybe change the title of the thread, please? A "How To:" title would be instructions on how to actually do it. a "How To?" title would be a question for others to tell you how to do it. See the difference?
seconded
seconded
Thirded.
I came in here thinking the iPhone 4 / iOS 4 way had been found 🙁.
Disabled because Apple knew the first thing people would do is enter field test mode when they discovered the wonders of their not-so-improved antenna.
sixthed?
Seventhed! I thought that you were telling me how to do it. At least add a question mark in your title.
How sad that we iPhone users don't have an app that show signal levels. Android phones have several such apps. One I tied is "Real Signal" which separates voice from data signal levels.
Come now, Apple. We can handle the truth.
Interesting. Although I cannot get into field test mode either, the "tap the bars to toggle to dB, tap again to get bars" hack still works for me.
I enabled that on my 3GS back in early iPhone OS 3.x days, and it persisted across the upgrade to iOS 4, and even survived the restore-from-backup that I applied to get my data onto my iPhone 4. Of course, now it toggles by itself rather often, but it's there.
That seems useful. How do you enable that hack?
For 3.x to force quit you need to hold sleep/power until shut down prompts and then you hold home for a couple seconds. Did that method on my 3gs on 3.1.2 made a back up and restored to ip4 and now toggle works.