This is the modem guide for the Flow (Trinidad) modem that was given to me. It’s an Arris TM602G. Your model may be different so look for the model number on the back and locate the guide on the Arris website. Embedding the guide here in case you are looking for it.
The most I’ve ever had to do was reset the modem by taking out the battery. There is also a reset switch at the back. I used to have access to the modem status page at http://192.168.100.1/ but it seems as if they disabled that with a firmware upgrade and now it says “Access to this web page is currently unavailable.” If you have any Flow internet troubleshooting tips feel free to share them in the comments.