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Some ports on the front of computers or laptops are not fully driven with 500mA current, so the phone will not charge AND connect properly. The same with hubs, if it's not powered, it often will not work. Extension cables can also limit the current available.I really was surprised at the failure to mount the drive after the froyoo update,disk drive was not detected only charging.I read the threads here,changed the cable nothinng happenend,only charging.Finally i Switched off the mobile for sometime aaaand restarted it --everything was as before-working perfectly well,hope this maybe helpful to some of you guys
This is normal behaviour for devices that can both be charged and accessed like a flash drive, depending on the amount of current required for the device. A phone tends to draw most of the available current to charge so while a small device may work fine, a phone may not.
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