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Why Cant We Enter Field Test Mode on iPhone 4?

JoJoCal19

JoJoCal19

macrumors 65816
Original poster
Jun 25, 2007
1,078
55
Jacksonville, FL
I've tried to do the field test mode by typing *3001#12345#* but when I hit call it doesn't do anything.

Does anyone know how to enter field test mode on the new iPhone 4?
 
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.
 
BrownManUPS said:
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.
Click to expand...

Ah thanks for the heads up. It would REALLY help this signal loss situation if we could look at the signal strength rather than the bars.
 
Man I REALLY hope JB'ing will bring this feature back... i bet AT&T demanded it be removed... :mad:
 
Title change maybe?

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?
 
rusty2192 said:
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?
Click to expand...

seconded
 
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.
 
deimos256 said:
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.
Click to expand...

This and the fact that Apple for the first time decided to create a case for their iPhone that magically only covers the effected area makes me believe Apple knew the iP4 was going to have problems.
 
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.
 
barefeats said:
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.
Click to expand...

We certainly can but Apple can't ;)
 
extrachrispy said:
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.
Click to expand...

That seems useful. How do you enable that hack?
 
Dokk said:
That seems useful. How do you enable that hack?
Click to expand...

Supposedly, go into Field Test and hold the home button for several seconds until the app is shut down. I tried on my iOS 3.1.3 phone, but the Field Test app never quit - I wonder if Apple disabled force-quit of Field Test in 3.1.3.
 
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.
 
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