In my phone not working wifi

Hi @u9ci

Try using the phone's WiFi (or BT) as close as possible to your home network router (or BT device) i.e. <10cm and check if it detects the WiFI network (or BT device) and connects and maintains a stable connection or not.

If it does then there may be a problem with the WiFi/BT antenna in the phone. A loose connection or faulty WiFi/BT antenna perhaps.

Below is an image taken from this teardown video showing the location of both ends of the antenna cable, where it connects to the boards.

If you determine that the antenna is faulty search online for GH81-20151A to find antenna suppliers that suit you best.

The same antenna is used in a lot of Samsung models, not just the galaxy A02.

(click on image)