New SIM applet for all Telnyx SIMs with smarter, self-healing connectivity

Telnyx SIMs are gradually moving to a new SIM applet, replacing the legacy ones. The enhanced SIM will now pick the best profile for your location, with automatic IMSI fallback, and recovers on its own if service or data drops. No config required.

What's new

• Smarter profile selection: picks the right network profile automatically, with automatic IMSI fallback. No APN configuration needed.
• Automatic recovery: updated SIMs correct configuration issues on their own, without unnecessary IMSI switches.
• Zero user interaction. Service impact is minimal, and some devices may briefly reconnect to the network as the new applet takes over.
• New STK menu on device: limited functionality; manual IMSI switching is no longer available.
• Real-time visibility: the applet reports live network events, powering tighter fleet-control features soon.

Why it matters

• No action is required. The update applies automatically over the air. Some devices may briefly reconnect during the update; everything else continues as normal.
• Automatic recovery reduces the support load tied to SIM configuration issues.
• No APN setup removes a manual device configuration step across your fleet.

Timeline

• New eSIMs: updates and improvements are in effect for all new eSIM activations.
• Live SIM cards: an over-the-air campaign will start on November 16, 2026, applying the update progressively in waves. Cards pick up the change at their next OTA window.
• New SIM cards: SIM v5.0 ships with all of this built in.

Getting started

To see the change right away, purchase and install an eSIM from the Telnyx portal and check the SIM Toolkit menu.