Testing Codes: Unlock Hidden Features on Your Phone

Ever wonder why some phones seem to have secret tricks that others don’t? Those tricks usually live behind testing codes. A testing code is a short sequence you type into the dialer to open hidden menus, view hardware stats, or run diagnostics. You don’t need a tech degree—just a few taps and a bit of curiosity.

What Exactly Are Testing Codes?

Testing codes are built‑in commands that Android and some iOS devices keep hidden from everyday use. They can show you battery health, signal strength, CPU usage, or even let you reset parts of the system. Think of them as the backstage pass for your phone’s inner workings. Most codes start with *# or #* and end with #. When you enter them, a new screen pops up with info or options that aren’t available in the regular settings.

Top Testing Codes You Should Try Right Now

1. Check Battery Health – Dial *#*#4636#*#* (or *#*#*#*#* on some devices) to open the Testing menu. From there, tap Battery information and see real‑time stats like temperature, charge cycles, and health percentage.

2. View Signal Strength – Enter *#*#726#*#* to launch the Phone Information screen. You’ll see signal bars, network type, and a detailed RSSI value that tells you how strong your connection really is.

3. Run Full Hardware Test – Use *#0*# (works on many Samsung models) to open a multi‑panel test. Each panel checks the display, touch, camera, speaker, and sensor functions. It’s a quick way to spot a faulty component before heading to service.

4. USSD Balance Check – Not exactly a testing code, but it’s a handy secret. Dial *#123# (or your carrier’s specific code) to get instant balance and data usage without opening an app.

5. Reset Network Settings – Type *#*#4636#*#* again, then choose Phone information > Reset phone network settings. This can solve dropped calls or Wi‑Fi hiccups without a full factory reset.

These codes work on most Android phones, but a few manufacturers might change the numbers. If one doesn’t open anything, try a quick Google search with your phone model plus “testing code”.

Using testing codes is safe as long as you stick to view‑only menus or standard resets. Avoid codes that promise to delete system files or flash firmware unless you really know what you’re doing. Accidentally wiping data is a common pitfall for curious users.

Now that you have a handful of useful codes, the next step is to make them part of your routine. Next time your battery drains fast, pop open the battery test and see if temperature is the culprit. When your call drops, check signal strength before calling your carrier. These quick checks can save you time, money, and a lot of frustration.

Got a code that worked for you? Share it with friends or drop it in the comments on Mobile Monday India. The more we share, the more we all get to use our phones to the max.