iOS 14 Includes Redesigned Field Test Mode - MacRumors

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Apple's upcoming iOS 14 update introduces multiple design changes, including a new look for the hidden Field Test Mode feature on the iPhone.

As noted on the MacRumors forums, Apple has overhauled Field Test Mode to provide more useful information at a glance.

Field Test Mode in ‌iOS 14‌
There's now a Home section with LTE Cell Serving Info, along with a menu section that has other details like device info and breakdowns of LTE, UMTS, and GSM functionality.

Much of the info available in iOS 13 and ‌iOS 14‌ is the same when it comes to Field Test Mode, so the change is primarily related to design and making it easier to navigate through the hidden app.

Field Test Mode is designed to allow ‌iPhone‌ users to access in-depth information about cellular signal and cellular connection. Field Test Mode is designed for engineers and cellular operators and most people will not need to use it on a regular basis.

Field Test Mode in ‌iOS 14‌
You can access Field Test Mode on an ‌iPhone‌ by opening up the Phone app, inputting *3001#12345#* and pressing the phone button. It won't make a call, but will instead open the Field Test app.

Field Test Mode was formerly useful because it could turn the cellular signal bars into a numerical measurement, but that is not something that works on modern iPhones with recent versions of iOS.

Field Test Mode in ‌iOS 13‌
It can still sometimes be useful to see cellular signal represented as a number, and that's still possible on ‌iOS 13‌ and 14. After entering the Field Test app, tap on LTE (from the main menu on ‌iOS 13‌ or the menu list on ‌iOS 14‌) then tap on "Serving Cell Meas."

The measurements that read "rsrp0" and "rspr1" are your cellular signal strength in decibel-milliwatts. These numbers are always negative, and a lower negative number is better than a higher negative number and represents a stronger connection. Numbers range from about -50 to -130. Closer to -50 is a strong signal strength, and when you get to around -100, that's a poor connection that's spotty with slow data speeds if a connection can be made at all.

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July 28, 2020 at 01:25AM
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iOS 14 Includes Redesigned Field Test Mode - MacRumors

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