Works fine with a OLD Sony Ericsson, so I don't know what you are talking about... I want to address one thing about the cellphone inside a NIT. We all agree that it would be bad because telco companies might place restrictions (like the iPhone), but another complaint is the "I don't want to be stuck with 3G or 4G, because it is not upgradeable, thus I would like to pair with a phone over bluetooth so I can have the fastest internet connection." Ok, the way the market is moving today, by the time 5G or full coverage of 4G comes to the market, I am 99.999% sure that you could buy a phone or MID or whatever that is cheaper and faster etc than a tablet. So why the hell would you use a tablet in the future, when the phone you are using to tether is BETTER than the tablet itself? Just does not make sense...