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Using different protocols for emergency call predates any caller location information. The main drivers at the time were network coverage (your SIM might have
by usr1106 2y ago
Using different protocols for emergency call predates any caller location information.
The main drivers at the time were network coverage (your SIM might have no coverage, but a network you are not allowed to roam for ordinary calls in has) and congestion (emergency calls can preempt ordinary calls).