Gizmodo reports that iOS 4.1 has reincluded the Field Test mode to iOS. Field Test mode allows you to get a numerical figure for your antenna strength rather than the traditional bar measure. To get to Field Mode:
- First, upgrade your iPhone 4 -- or any iPhone -- to iOS 4.1. - Dial *3001#12345#* into your phone [and press Call].
Pressing Home will exit you from the Field Test mode. For reference, Anandtech provides a good discussion about bar strength and signal values. Since that article was published, Apple has remapped the signal strength to # of bar ratio. More negative numbers are worse, and Anandtech reports they were surprised they were able to hold calls with signals as low as -113db.
Most customers won't care about their numerical signal strengths, but the antenna strength changes generated a lot of publicity surrounding the iPhone 4 launch due to issues with new antenna system.
Thursday August 6, 2026 7:03 am PDT by Joe Rossignol
It is now August, and that means the iPhone 18 Pro and iPhone 18 Pro Max are just a month away. The devices are expected to look similar to the iPhone 17 Pro and iPhone 17 Pro Max, but there will still be many year-over-year changes, with rumored features including a smaller Dynamic Island, 5G via satellite, and more.
Apple is expected to unveil the iPhone 18 Pro, iPhone 18 Pro Max, and a...
Apple has been planning to release AirPods with cameras as early as this year, according to Bloomberg's Mark Gurman. If so, they could be unveiled as soon as September alongside the iPhone 18 Pro models and the long-rumored foldable iPhone.
The earbuds are expected to have a design similar to the AirPods Pro 3, but with tiny cameras.
Given the AirPods with cameras will likely be more...
After 326 days, iOS 26 has received its first jailbreak, thanks to the developers behind the popular Dopamine jailbreak.
Lars Fröder, better known as opa334, today released Dopamine 3.0, which adds support for a number of newer firmware versions, including iOS 26.0 and iOS 26.0.1 on devices with A12 or A13 chips.
Another major addition in today's release is support for all devices running...
Apple's first foldable iPhone, with a book-style design featuring a ~5.5-inch outer display and a ~7.8-inch inner display with a minimal crease down the middle.
