Updating procedure huawei e220
Depending on what you have it may not allow the outgoing traffic.The definition of upgrade traffic profile is as follows: It is UDP, both initiator and responder are at port 13456.
Then normal boot process is stopped and the box will wait for a firmware file to be delivered to it. (The Kabuto car in the bottom corner is optional ) Next thing you'll need to confirm is your firewall software (or Windows built in one).
On startup this will happen: Just point the file selector to your already installed Win RAR: That's it. Now this is the time to start practicing the upgrade mode -switch on power up. It will look like this on your LEDs: Serial console logs indicate, that you'll have 0,850 seconds from power-on to words "not in router upgrade mode" to be logged.