New Diag Enable Code Letest 2025 (All Brands)

 

Diag Enable Code New 2025 (All Brands)

Diag Mode (Diagnostic Mode) is a special function hidden inside most smartphones.

It lets service software like HCU, OptuPlus, QPST and others communicate with the phone.

This is often used for:

IMEI repair

Hardware testing

Network unlocking

Below is a complete list of working Diag Mode codes for many popular brands.

You can open the diagnostic port without rooting or flashing your device.

Diag Codes

Brand / Model Code / Steps Extra Info

Huawei ##2846579## → Project Menu > Background Settings > Manufacture Open port via HCU or OptuPlus

Vivo *#585#, *#588#, ##558# → Quality Verification Test > Diagnostic Port Works on most Vivo models

Motorola Motorola Menu > Enable Diag [Factory Enabled] May require service menu access

OnePlus *#801#, *#8011# OR CDMA/LTE > Volte > OnePlus Open Diag Menu > Rndis, diag switch ON Works on OxygenOS & ColorOS builds

LT Mobile CDMA/LTE > Volte > LT Open Diag Menu Used for CDMA/LTE testing

China Mobile ##717717## Some models require engineering mode enabled

Samsung (Sprint) ##3424# Opens Sprint Diag Menu

Samsung (Verizon/USC) ##3666333# For Verizon & US Cellular models

Samsung (Others) *#0808# USB settings menu

Xiaomi / Redmi ##717717##, ##13491## OR Enable Diag in engineering settings Works on MIUI-based devices

Lenovo ##8899## Opens Lenovo service mode

ZTE *#7678# OR Enable Hidden Menu: ZTEOPENEM# (983673636#) → Quick Pop-Up → 98387274# Also via CDMA/LTE > Volte > ZTE Open Diag Menu

LG Open Diag Menu OR *#546368#*model# OR ##7262626## Sprint & other variants supported

OPPO *#801# → Enable Engineer Mode Toggle Works on ColorOS

📝 How to Use These Codes

Open your phone dialer.

Type the code exactly as shown.

If a menu opens, look for Diag Mode, USB Settings, or Engineering Mode.

Select the Diagnostic Port or similar option.

Connect your phone to your PC with a USB cable.

⚠️ Warnings & Tips

 Some codes work only on specific regions or carriers.

Changing wrong settings may cause network or hardware issues.

Always make sure IMEI repair or unlocking is legal in your country.

For brands like Huawei and Xiaomi, you may need extra tools to fully activate the port.

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