In a few days, friends who work and do business outside go home for the Spring Festival. But after they go home, they will definitely encounter such a problem: that is, the high roaming fee makes many people dare not to make or answer phone calls. Although it's cheaper to apply for a card in their hometowns, mobile phones used in other places still need to be on standby. If an important call is missed, it will be bad. At this time, dual-standby mobile phones come in handy. Whether it's G-network dual standby or dual-mode dual standby, it can help consumers solve this problem. Today, we will introduce several such products to you so that you no longer have to fear high roaming fees.