One of the most important upgrades of the iPhone 12 series this year is 5g, and Apple’s 5g band is arguably the most comprehensive in the world, with a total of 18 bands. However, there are some problems in foreign countries. When dual cards are used, 5g can only be used. Fortunately, the problem of BOC is avoided perfectly. The U.S. operators have confirmed this problem. Only in the single card state can the iPhone 12 fully support 5g. After the issue of < / P > < p > broke out, many people also worried that the Bank of China’s iphone12 will also have dual card 5g problem. However, apple lifted the evaluation tonight, and the netizens who got the first batch of products actually measured that the 5g dual card is OK. < / P > < p > in short, when one card of iPhone 12 / 12 Pro is 4G, the other card can be 5g. The combination of 5g + 4G dual cards is also the most common combination of 5g mobile phones. At the same time, there is no dual card + double 5g mobile phone. It is estimated that it will have to wait. < / P > < p > it should be noted that the iPhone 12 Mini is not a dual card, it is the only single card mobile phone among the four mobile phones, but there is no double card entanglement. Epic Games accused Google of monopolizing the latter, which may have a better chance than apple