Proximity Sensor Flex Cable for Lenovo A850 plus

The Proximity Sensor Flex Cable / Patta in your Lenovo A850 Plus carries the signal from the proximity sensor — which uses infrared light to detect when an object such as your face is close to the screen — to the motherboard. When you hold the phone to your ear during a call, the proximity sensor detects your face and turns off the screen to prevent accidental touches. A damaged flex cable breaks this signal pathway on your Lenovo A850 Plus, keeping the screen active throughout all calls.

The Proximity Sensor Flex Cable / Patta carries only the proximity sensor signal. The Proximity Light Sensor Flex Cable / Patta is a combined assembly carrying both the proximity sensor and the ambient light sensor on a single flex. On some Lenovo A850 Plus devices these are the same component while on others they are separate. Check your model's sensor layout to confirm which assembly your device uses before ordering.

Yes — check Settings — Display or Call Settings and ensure the proximity sensor is not disabled before ordering a replacement. Also clean the proximity sensor area at the top of the display from the outside as a dirty sensor window can mimic sensor failure. If the issue persists after these checks, the flex cable or sensor on your Lenovo A850 Plus is physically damaged.

Yes. The proximity sensor emitter and receiver must align with the sensor opening in the display frame or front housing of your Lenovo A850 Plus. Misalignment — even by a millimetre — significantly reduces detection range and reliability. Ensure precise positioning during installation.

Yes — a 7-day replacement warranty covering manufacturing defects is included. An unboxing video is mandatory for all warranty claims. Flex cables showing physical damage from improper installation are not covered under warranty. For more information, check out SAHII's Return Policy.