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  1. Primary SIM (SIM1) registers and connects if available.

  2. The primary ping target will be pinged at the time interval set by the user in "Primary ping target".

  3. The modem will continue to ping the SIM1 target and will remain on the primary SIM (SIM1).

  4. If pings to the primary (SIM1) target are unsuccessful, the modem will switch to the secondary SIM (SIM2).

  5. The secondary SIM (SIM2) will ping the "Secondary ping target" while on SIM2. If successful, it will remain on SIM 2 and continue pinging the secondary target from the secondary SIM (device will stay using SIM 2).

  6. If the SIM2 (secondary) PING URL is not reachable from SIM 2, it will switch back to SIM 1 after the specified ping interval and then return to step 1.

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  1. The primary SIM (SIM1) attempts to register and connect if available.

  2. The primary ping target is pinged at the time interval set by the user in "Primary ping target".

  3. The modem continuously pings the SIM1 target and remains on the primary SIM (SIM1).

  4. If pings to the primary (SIM1) target fail, the modem switches to the secondary SIM (SIM2).

  5. While on the secondary SIM (SIM2), the modem pings the "Secondary Ping Target". If successful, it remains on SIM 2 and continues pinging the secondary target from the secondary SIM (Device stays using SIM 2).

  6. While connected to the secondary SIM (SIM2), the modem attempts to ping the primary (SIM1) ping target. If the primary (SIM1) ping target continues to fail, the modem remains on the secondary (SIM2). If the primary (SIM1) ping target is available, the modem switches to the primary (SIM1) connection.

  7. If the SIM2 (secondary) PING URL is not reachable from SIM 2 and the primary (SIM1) connection is not available, the modem switches back to SIM 1 after the specified ping interval and returns to step 1.

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