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I was only able to run more than 1 account at a time if I was using my phone with 3G mobile internet and another account active on my home internet connection.
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The maker of the game tracks internet connections and so only a single account can be active at a single time from a shared registered IP address that they keep track of. I also left it open for any others who want to join to openly join up without worry of then getting kicked for not being active enough etc.
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Otherwise it costs you a forge point per trade outside of guild trade. I created a guild so that all accounts the main and 4 alias's can trade between guild members for free. I also play this game and have 5 accounts. They track IPs and associate IP's to accounts. Has nothing to do with your local systems or mobile devices nor router.
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