GeeekPi RPi 4G / 3G Hat for Raspberry Pi Zero/Zero W/Zero WH/2B/3B/3B+/4B,Jetson Nano,Supports SMS, MMS, mail, TCP, UDP, DTMF, HTTP, FTP

This board works exclusively over USB. If you are a beginner, this is how you get it working on Raspberry Pi with Raspbian in command line:sudo apt install python3sudo apt install pipsudo apt install minicom //Look up your modem's documentation to use AT Commandssudo pip install nmclisudo pip install mmclisudo nmcli connection add save yes type gsm con-name <YOURCONNECTIONNAME> apn <YOURAPN>sudo nmcli con up gsmVisit MMCLI documentation page for more on modem operation.sudo mmcli -m 0 enableSMS:sudo mmcli -m 0 --messaging-create-sms=number"RECIPIENTNUMBER",text="YOURMESSAGE"--(returns storedAddress)--sudo mmcli -s <storedAddress> --sendsudo mmcli -m 0 --messaging-delete-sms=/org/freedesktop/ModemManager1/SMS/<storedAddress>sudo mmcli -m 0 --messaging-list-sms(add -J to output in JSON format)

Many reviews call this out as not working or not having instructions, but this works brilliantly!It's up to you to find out the GPIO layout of YOUR board to know where to plug your leads for the fan.60 seconds to lookup GPIO layout, plugged the fan it. Works great!

No instructions came with it we dont know where to plug in which GPIO should i used and trust me im not a newbie

You may want to find something a bit easier...there was no instructions packaged with the one I received.I bought a sim That Is to work its a nano .... there is no info as to what programs that one could use to operate the 4g LTE. no videos on how to use this product.No videos on suggested use.Honestly my advice is pass on this company s Hat ....No Info for a NEWbee... "This stunts the Growth of New user"