Power and Volume Button Flex Cable
Huawei P Smart Z Power and Volume Button Flex Cable Replacement
- Fits
- Huawei P Smart Z
- Fixes
- Unresponsive buttons
- Quality
- Brand new, OEM quality
- Fitting
- Professional install
Overview
What this part is
On the Huawei P Smart Z the power and volume keys press on small switches mounted on a flex cable inside the frame. Drops, pressure and moisture can break a switch or the cable, so a key stops working, works only sometimes or stays pressed.
This is the internal flex cable with the switches, not the outer key caps. It connects to the phone by a plug-in connector. Check the photos to compare it with the part in your phone.
Compatibility
Specifications and compatibility
- Part
- Power and Volume Button Flex Cable
- Compatible with
- Huawei P Smart Z
- Model numbers
- STK-LX1
- Does not fit
- Huawei P Smart 2019, P Smart 2020, P Smart 2021 or any other model
- Fixes
- Power or volume keys that do not respond, respond only sometimes or act as if held down
- Does not fix
- Missing or broken outer key caps, software or main board faults
- Quality
- Brand new, OEM-quality power and volume button flex cable. Tested before dispatch.
- Brand
- Unbranded, compatible with Huawei P Smart Z
- In the box
- 1 × power and volume button flex cable for Huawei P Smart Z.
- Colour
- As shown in the photos
- Installation
- Professional installation recommended
- Supplied by
- Supreme Phone Parts Ltd, Manchester, UK
Before you order
Is this the right part?
Signs it needs replacing
- The power key does not wake or lock the phone
- Volume keys do nothing when pressed
- A key works only when pressed hard or at an angle
- The phone keeps taking screenshots or changing volume by itself
How to check your model
Open Settings › About phone. The model should read P smart Z and the model number should start STK-.
The P Smart Z has a pop-up selfie camera, so there is no notch or hole in the screen.
Professional installation
How a technician fits this part
- Power the phone off and remove the SIM tray.
- Warm the back cover edges and lift it off carefully with a plastic opening tool.
- Remove the screws holding the inner covers, then disconnect the battery before anything else.
- Unplug the button flex cable and carefully peel it away from the frame.
- Fit the new flex cable in the same position and plug in its connector.
- Refit the covers and screws, apply new adhesive and close the phone, pressing evenly.
- Reconnect the battery if needed, power on and test power, volume up and volume down.
Check that the part matches the device before fitting it or removing any adhesive backing. Once a part has been fitted, it cannot be returned for a change of mind. Faulty parts are always covered.
FAQ
Frequently asked questions
Will this fit my Huawei P Smart Z?
Yes, if your model number is STK-LX1. Check it in Settings › About phone.
Does it fit the Huawei P Smart 2019?
No. The P Smart 2019 has a notch screen and a different internal layout. This part is for the P Smart Z only.
Does it include the outer buttons?
No. This is the internal flex cable with the switches. Your existing outer key caps are reused.
Is it made by Huawei?
No. It is a brand new, OEM-quality power and volume button flex cable made to fit the Huawei P Smart Z, and every part is tested before dispatch.
Should I fit it myself?
We recommend professional installation. The Huawei P Smart Z has to be opened carefully with heat and plastic tools, and the battery must be disconnected before the new part is connected.
How quickly will it arrive?
Orders placed before 4pm on a working day are dispatched the same day from Manchester by Royal Mail Tracked. Delivery is free on UK orders over £5. You can also collect from our shop at 33 Moulton Street, Manchester M8 8FQ.
Prepared by the Supreme Phone Parts team, Manchester. Last updated September 2026.