(TECH) antenna for xadox gsm+ble module?

There is a PCB Antenna Slot, seeedstudio.com/wiki/Xadow_GSM%2BBLE, I didn’t see any specific mention of a requirement for an antenna for gsm/ble. I’m not an electrical engineer, so wondering if this is needed or if the module has a good enough antenna built in.


The antenna will be included in the kit.

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