iPhone 4 OS 4.2.1 Field Test Mode
If your iPhone is still in lower OS version, you should upgrade the firmware to IOS 4.2.1 now to enjoy the field test mode again.
In IOS 4.0 no Field Test Mode was given. In IOS 4.1, only the signal bar changed to signal level without any detail information. Now ISO 4.2.1 give all the detail as before with the signal level indicator.
The latest version (Nov 2010) is 4.2.1 (8C148). Some screenshots are attached.
p.s. to activate field test mode of iPhone, type *3001#12345#* and hit call
6 comments:
hi do you know if there is a program similar to celltrack for iphone 4?
How do you tell what site and sector you are on
Still running on iOS 5
how can I use it in dedicated mode?
place a call and than add a call like confrance call and type code digits. don't forget pressing "call" at the end
Versions of iPhone change, but actually nothing changes :) I work with iphone app development and iphone apps are practically the same inspite of the fact that they released iPhone 6 and iOS 8.
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