Remove the soldered connections to separate the antenna wire from the motherboard.
The antenna wire will be connected to the motherboard with 2 connections, so be sure to remove both with the soldering iron.
Follow the link below for further soldering information: How To Solder and Desolder Connections.
Soldering irons require a large amount of heat; use caution when performing this step. Excessive heat can damage parts of your device; do not leave the soldering iron on connections for extended periods of time.
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