I bought Raspberry Pi 3G/4G & LTE Base HAT and Quectel UC20 modem for my raspberry pi 4B. I still don’t know whether I should buy an antenna because I couldn’t find it from the provider’s store.
Briefly, I’ve downloaded the repo from the git and finished installation. I couldn’t connect to internet and ran the pon command and saw “unsupported protocol 0x3 received” errors. I use a sim card named Turkcell which is a brand from Turkey. I have made some research on community and saw this post (3G Base Hat UC-20 NO DIALTONE issue). According to post I should have registered my sim card on connect.sixfab.com. I also implemented it as I read on the post, but no luck. It is said “ICCID is not valid!”, and didn’t let me to register my sim card.
I hope that someone helps me to figure out how to do.