The Managed Backbone · Delivered by Cellhub

You get the security. We run the mobility.

SEMM: Simplified Enterprise Mobility Management, is the operations layer under every SEP 360 subscription. Delivered through Cellhub, T-Mobile's longest-tenured primary agency partner, SEMM handles the entire mobile lifecycle: procurement, activation, enrollment, support, and replacement. Your team gets protected devices that just work. Your IT staff gets their time back.

Delivered by Cellhub Managed Services · T-Mobile's longest-tenured primary agency partner

Why it matters

Security tools fail when nobody runs them.

Most mobile security projects don't die from bad technology, they die from unmanaged logistics. Devices sit in boxes waiting for activation. Users can't enroll and give up. The one IT generalist becomes the help desk for every phone in the company. Six months later, half the fleet is still unprotected.

SEMM is why SEP 360 deploys in 90 days instead of 9 months. Cellhub operates the rollout end-to-end, carrier activations, kitting, over-the-air enrollment, and a 24/7/365 white-glove help desk that answers every user call, so both security layers reach every device, and stay there.

What SEMM covers

The full mobile lifecycle. Managed.

  • Procure & Kit

    Devices arrive ready

    End-to-end device procurement, staging, and kitting. Phones ship activated on T-Mobile 5G with SecureComm and EndPoint Shield pre-configured, out of the box, ready to work.

  • Activate & Enroll

    BYOD over the air

    All carrier activations handled by Cellhub. BYOD users enroll via QR code or email invite in minutes: any device, any carrier, with MDM/Intune integration where you already have it.

  • Support

    24/7/365 white-glove help desk

    Every user calls one number and a human answers, around the clock, every day of the year. Your IT team never becomes the phone help desk.

  • Replace

    Advanced exchange

    A device fails and a working replacement ships next business day, before the broken one even comes back. Nobody works unprotected while a phone sits in an RMA queue.

  • Secure at the SIM

    Zero Trust · T-SIM Secure

    Cellhub's modular Zero Trust platform is anchored by SEMM and T-SIM Secure: carrier-native security applied at the SIM level, beneath the apps, beneath the OS. A layer no software-only vendor can offer.

  • Optimize

    Lifecycle & cost control

    Ongoing plan and fleet optimization, OSS/BSS integration, and AI-driven network design. Add users in minutes, offboard cleanly, and see it all on one contract, one support line, one invoice.

SEMM is included in every SEP 360 subscription, it is not an add-on. One monthly per-user price covers the security and the operations.

What it manages

The two layers SEMM runs.

SecureComm

A dedicated, encrypted, archived business line on every device, powered by Movius MultiLine. Full feature list →

EndPoint Shield

AI-powered mobile threat defense that stops phishing, smishing, and ransomware, powered by Lookout. Full feature list →

Ready to act

Protect your business before the next attack forces the issue.

Schedule a 30-minute SEP 360 assessment with L2 Squared Technologies. We'll walk through your current mobile exposure, show you exactly what protection looks like in your environment, and build a deployment roadmap, at no cost.

Schedule an assessment Explore SEP 360 first
  • Premiere T-Mobile for Business Partner
  • Strategic Partner: Movius MultiLine
  • Powered by Lookout Security
  • Managed via SEMM · Cellhub

Prefer direct? Email mcap@lsquared-technologies.com