I could not find anything that said it would or wouldn’t work on other phones but based on the quote found here, “there are two main reasons why we created Librem AweSIM and why we think Librem 5 customers will love it: convenience and privacy”, inferences that it could be used for other phones IMO. Technologically I don’t see why it wouldn’t work either. A sim card is just a card that contains network info and a unique user thumbprint (MAC and IMEI IMSI). It’s just odd they don’t mention whether it would or wouldn’t work on other phones. Either they only see Librem users as their only demographic (fair), or its classic Purism withholding information for seemingly no reason.