HPCL

Task Description:
Implement and validate SIM Number handling and validation in the FMS product to ensure accurate SIM mapping, prevent invalid entries, and maintain correct device-SIM association during installation, replacement, or SIM change scenarios.

Scope:
FMS Mobile App
FMS Web Portal
Backend Validation

Functional Requirements:

System should allow entry of SIM Number during:
New Device Installation
SIM Replacement
Setup Flow

System should validate:
SIM Number should not be blank
SIM Number should be numeric
SIM Number length validation (as per standard – e.g., 19–20 digits ICCID)
System should prevent:
Duplicate SIM entry
Invalid SIM format

System should update SIM details in:
Device Mapping
Work Order
Backend Database.

Expected Result:

Valid SIM Number accepted and saved successfully.
Invalid SIM Number rejected with proper error message.
SIM correctly mapped to device and merchant.