starview 3and4 factory reset

hello,i just bought starview receivers 3and4 cheap, all the channels are working ok, i would like to know if i did a factory reset and did the auto scan would the firmware stay on the receiver, i ask because there a lot of the same channels on six or more times i know there is "delete channels" on the eurovox but i am not sure what would happen on the starviews, i asked the lad who i bought them of and he said he just did the auto scan, any help appreciated
 
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