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Your GPS tracker may not support the SIM cards you’ve tried. Additionally, many mobile operators are phasing out 2G and 3G networks, which could affect devices that rely solely on these connections. For instance, in Chile, Entel has announced plans to begin shutting down its 2G network in the second half of 2024.
Given that the Coban GPS303G tracker operates on 2G/3G networks, this network phase-out may impact its connectivity.