flashing question

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http://androidforums.com – So i got my firmware stock d to install successfully . Thanks everyone , my question is if i install backup from recovery , will it change my 4g back to ev or is the 4 g staying there ? I recently was trying to go back to 4g and got stuck on lg logo . Do not wipe system if your not going to install a backup or rom , it will do that . Just a heads up . I want to have 4g on mini motion d but im afraid if i flash it , it will give me ev again . So does installing my recovery set me back to ev automatically since i backed it up while in ev . Or does the settings for 4g stick ? (General)