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Difficulty: Very hardMobile Device Wireless and Network Connectivity

A field technician is onboarding a fleet of corporate smartphones into a mobile device management (MDM) portal. During cellular profile provisioning, the technician attempts to whitelist the devices on the carrier network by entering the 15-digit numerical code printed on the physical SIM cards into the MDM's hardware inventory system. Consequently, cellular data access and carrier activation fail across all deployed handsets, despite each device showing a full cellular signal. Which of the following root causes best explains this failure, and what is the correct action to resolve the issue?

  1. The technician recorded the International Mobile Subscriber Identity (IMSI) instead of the International Mobile Equipment Identity (IMEI); update the portal with the device's hardware IMEI.Answer
  2. B
    The technician recorded the International Mobile Equipment Identity (IMEI) instead of the International Mobile Subscriber Identity (IMSI); reconfigure the cellular profile to authenticate using the handset's MAC address.
  3. C
    The cellular network interface reverted to an Automatic Private IP Addressing (APIPA) address; release and renew the DHCP lease on the carrier radio interface.
  4. D
    The device mail synchronization service was configured using POP3 instead of IMAP; update the account server settings to utilize port 110 over the mobile network.

Answer

The technician recorded the International Mobile Subscriber Identity (IMSI) instead of the International Mobile Equipment Identity (IMEI). Entering the device's unique hardware IMEI into the portal will resolve the cellular activation failure.
The International Mobile Equipment Identity (IMEI) is a unique 15-digit serial number used by cellular networks to identify specific physical mobile devices. When provisioning and whitelisting mobile hardware within an MDM or cellular portal, the IMEI of the handset must be registered. The code printed on the physical SIM card is associated with the International Mobile Subscriber Identity (IMSI) or Integrated Circuit Card Identifier (ICCID), which identifies the subscriber account rather than the mobile hardware itself.

Step-by-Step Solution

1
Analyze the reported symptoms and administrative actions.
The technician entered a 15-digit code associated with the physical SIM card into the MDM hardware inventory system, causing network activation to fail.
Cellular network provisioning requires distinguishing between device hardware identifiers and subscriber profile identifiers.
2
Differentiate between mobile hardware and subscriber identifiers.
The International Mobile Equipment Identity (IMEI) uniquely identifies the physical mobile handset. The International Mobile Subscriber Identity (IMSI) is tied to the SIM card and identifies the user/subscriber account on the cellular network.
Carrier network hardware whitelisting and MDM hardware tracking require the IMEI.
3
Select the correct remediation step.
Obtain the 15-digit IMEI directly from the handset hardware/settings and update the MDM database.
Correcting the device inventory record allows the carrier and MDM to validate the actual mobile hardware.

Key Concept

IMEI vs. IMSI Identification in Cellular Mobile Devices
Estimated Time:2m 0s
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Topics

Mobile Device Wireless and Network Connectivity

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