I’m not very familiar with dual sims as nobody I know has a phone with this capability or even uses two different SIM cards for that matter. What’s the appeal of this, at least in the states? Is it mainly for travel or do people actually have two separate phone plans that are used on a daily basis?
This mostly applies to heavy international travelers and hugely popular in most Asian countries. US carriers don't need this because of the internetwork capabilities they have. Most Asian countries' network carriers don't play well with other networks because, well, why the hell would you wanna help your competitor? They would rather keep the revenue all to themselves rather than share a portion of it when users jump from tower to tower. There are no regulation rules that requires them to share their network with anyone.
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