The truth is something different here NONAME,We, at tech support, advise our customers not to use modem on both ports because, it will work fine on Ethernet port but the USB port will HANG again & again,Life of modem doesnot get short in that case but tech support do not advise customers to use both ports simultaneously so that users will not face the no browsing problem frequently due to the USB port hang problem o/w they will say that AIRTEL CONNECTION SUCKS, IT STOPS WORKING AFTER A SHORT TIME..