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Re: Three Questions
Force roaming is not an option yet for Android so unfortunately you cannot download any app to do that. As far as the screen is concerned if you go into settings and then sound & Display and scroll down you will see an option for "screen timeout"...you can alter the time for 30 second to 30 minutes.
You must have "root" access to acquire free tethering whether it's 3G or 4G...hope this helps.
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