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| Code | Function | |------|----------| | *#*#0588#*#* | – Wave hand over top of phone; value changes from "far" to "near". | | *#*#0589#*#* | Light sensor test – Covers sensor to see lux values drop. | | *#*#0673#*#* (or *#*#0283#*#* ) | Audio loopback test – Checks microphone and speaker simultaneously. | | *#*#0842#*#* | Vibration motor test – Phone vibrates continuously until dismissed. |
Now you can launch Engineer Mode with one tap instead of dialing *#*#3646633#*#* each time.
: Specifically used to verify that your device's microphones and speakers are functioning correctly. Software and System Information HardReset.infohttps://www.hardreset.info Codes for TECNO Camon 19 - HardReset.info How to Use Secret Codes on TECNO Camon 19
In most cases, the phone will automatically open the hidden menu as soon as you type the final character (usually a # or * ) . If it doesn't, tap the button. Essential Secret Codes for TECNO Camon 19
The most powerful secret code on TECNO Camon 19 is *#*#3646633#*#* . This opens the —a professional suite of hardware tests. | Code | Function | |------|----------| | *#*#0588#*#*
On Camon 19 (which is 4G-only), you cannot unlock 5G via codes because the hardware lacks a 5G modem. For 4G+ aggregation, Engineer Mode can enable CA (Carrier Aggregation), but this requires root access and may break mobile data.
Here is the most reliable and tested collection of codes for the Camon 19 series. | | *#*#0842#*#* | Vibration motor test –
| Code | Function | |------|----------| | *#*#0228#*#* | – Temperature, voltage, and charge level (similar to Samsung’s code). | | *#*#426#*#* | Google Play Services battery info – Shows last wake-up and battery draining apps. |
: A quick way to view all your synchronized calendar events and debug sync issues. Advanced Diagnostic and Engineering Codes
Sometimes codes fail. Here’s why and how to fix it:
| Code | Function | |------|----------| | *#*#0*#*#* | – Cycles through red, green, blue, and white screens to find dead pixels. | | *#*#2664#*#* | Touchscreen test – Draw on the screen to verify multi-touch accuracy. | | *#*#2663#*#* | Touch panel version – Shows firmware version of the digitizer. |
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