A suitable API for the initial pre-provisioning of SIM inventory (IMSI, ICCID, authentication keys) into the core network is TMF702 (Resource Activation and Configuration).
This API is designed for activating logical resources like a SIM profile on network elements (HSS, OTA). The TMF664 API is generally used for broader lifecycle management operations (heal, scale, migrate) of resource functions and may not directly map the specific registration parameters required.
The subsequent plan to use TMF641/640 for customer-facing service activation and policy definition on HSS/PCRF is correct.
For end-users, successful service activation also depends on correct device configuration. A common issue faced is a tm sim card no signal error, often resolvable with specific device troubleshooting steps. A detailed guide can be found here: Fix TM SIM No Signal Instantly 2025.
This clarification should help map the correct API to the pre-provisioning requirement.
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Norman Porter
TO BE VERIFIED
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Original Message:
Sent: Aug 07, 2025 13:56
From: jase phon
Subject: Best TMF API for Pre-provisioning of registration of SIM's
Use TMF702 (Resource Pool Management) for pre-provisioning SIM data like IMSI, ICCID, and keys into HSS/OTA. TMF664 is more for lifecycle operations (heal, scale, etc.) and may not suit this use case directly.
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jase phon
TO BE VERIFIED
Original Message:
Sent: May 23, 2024 08:49
From: Mahesh Choudhari
Subject: Best TMF API for Pre-provisioning of registration of SIM's
Dear All,
Need your quick input/guidance on using correct TMF API for SIM's registration. It's regarding pre-provisioning or registration of SIM's inventory at core network i.e IMS network HSS, AOTA etc. so before handing over to subscriber we do need to pre-provision or register respective IMSI , ICCID etc. range on network along with its authentication key and all so which TMF API can be used . Is it TMF664 or TMF702 etc. ?
Because later when actual customer or subscriber we reserve respective MSISDN and associate its ICCID,IMSI to activate service, plan offers etc. via PCRF, HSS then we will be using TMF 641-640 for respective activation of MSISDN, IMSI, ICCID at HSS, PCRF for policy and profile definition.
Kindly guide if will before when we get IMSI ranges and all from SIM's vendor and all with specific network specification and we need to get those registered on HSS, OTA etc. as a pre-requisite with its various authentication and network profile keys which TMF API can be best suited. If its TMF 664 how it can be used as I am unable to map MSISDN, ICCID, IMSI etc. ranges with resource function and its registration parameters with given operations like heal, scale, migrate or for activation of resource.
Thanks !!!
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Mahesh Choudhari
BT Group plc
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