Any good recommendation for a SMS relay solution, e.g. for those 2FA SMS that are tied to linked phone number? (e.g. banks).

basically want to leave a legacy phone with the physical SIM in a fixed location (office etc) but still be able to access the SMS it receives 

 My sim is hosted in a commercial GSM gateway by 2N. but there's autosms or you can use gnokii based scripts to relay to SimpleX with raspberry pi and GSM shield. just make sure that 2G network works and won't be discontinued soon. 

 🙏 

 Adding crypton.sh to the list of options, for reference. Had bookmarked them ages ago, but somehow forgotten