I have a AliExpress-sourced modem with a 2D SIM, which I use for sending SMS texts, which has worked fine for some years.  However, 3G shutdown is coming, so I need something to replace the old stalwart.  Are there any recommendations for such a thing?  I use it with smstools SMSD software.   In case the detail matters, the documentation notes:

This Software needs a GSM modem with SMS command set according to the european specification GSM 07.05 (=ETSI TS 300 585), a character-based interface with hex-encoded binary transfer of message blocks ("PDU Mode") of it, and alphabet support according to the GSM 03.38 (=ETSI TS 100 900).