@fredldotme Thanks for your kind help . I tried both options in different order without success. However, when turning airplane mode on messages come through after around 40 seconds. Then when turning airplane mode off message can be received for a few seconds. Please let me know if there's anything else I can try...

@fredldotme after various attempts installed it on GP 3a with the ubports-installer. But having the incoming sms problem described by @dieharddan. Also, Airplane mode on/off enables incoming sms temporarily. Any ideas on how to fix it?