Europe/asia/Africa uses 900/1800 and 850/1900 is used in North/South America. So, you are However, since under the phone's config it shows all 4 bands, it as been enabled for all 4. I think these phones were sold as triband. On the phone's hardware itself all 4 bands are there. it's just that the 4th band is hidden. However, it has been enabled on your particular phone. So, nothing for you to worry about.
Quote:
Originally Posted by lucho
900/1800/1900 Thanks
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Phones: Xiaomi Mi Mix 2, Samsung Galaxy A50, ASUS zenfone 3,
Sim cards: AT&T (Contract), 3 UK, Piranha Mobile