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No, not necessarily, but it can cause a minor issue. iPhones use a Lithium-Ion battery for its power, using while it's charging won't necessarily ruin the battery, but if you're using the phone while the battery is in the charging process, it can cause the phone to think it has more power than it actually has.
Fellow Nokia user here. Basically, if your phone can be charged by data port, it will automatically start charging as soon as cable is plug in to the computer. If it doesn't then you cant charge it using data cable. There is a workaround for this issue for some phones.ellow Nokia user here. Basically, if your phone can be charged by data port, it will automatically start charging as soon as cable is plug in to the computer. If it doesn't then you cant charge it using data cable. There is a workaround for this issue for some phones.