Trying to tether my Droid 3's 3G network to other units (laptop, tablet, etc.) through the factory installed Mobile Hotspot application. Have tried it on a couple of different units, have full reception but get "limited access" regardless. What gives? Cell provider confirms there is no limitation on mobile network sharing. (Droid 3 (XT862), Safestrap v3.05, Android version 2.3.4, system version 5.6.890).