Hi all, Mutli-recipient SMS implementation is needed to pass GCF test cases 34.2.9.1 and 34.2.9.2 for GSM; 16.1.9.1 and 16.1.9.2 for WCDMA. A new task should be added to oFono TODO and as requested by Denis we have to discuss first the proposals. I have in mind 2 solutions: 1- Add a new API in message manager methods using an array of string containing all the recipients and returning an array of message paths: GDBUS_ASYNC_METHOD("SendMultipleMessage", GDBUS_ARGS({ "to", "a{s}" }, { "text", "s" }), GDBUS_ARGS({ "paths", "a{o}" }), sms_send_multiple_message) It requires also to implement a new function in core based on __ofono_sms_txq_submit() to fill in the TX queue with all recipients before submitting the message. 2-Modify existing SendMessage API in adding a new mms argument: GDBUS_ASYNC_METHOD("SendMessage", GDBUS_ARGS({ "to", "s" }, { "text", "s" }, { "mms", "i" }), GDBUS_ARGS({ "path", "o" }), sms_send_message) It requires to add a new field in struct ofono_sms like 'int send_mms'. tx_next() function should be modified to check 'int mms' option before analysing the TX queue size. We should determine if send_mms = 2 options could be used. Even if we don't use it, send_mms should be set to 0 once all the multi-recipient SMS have been transmitted. Kind regards, Guillaume