Originally Posted by BCollins521
That's what UMA . And the reason why you are having a grey wi-fi signal is because either your either using a carrier other than TMo on your 8900 that doesn't support UMA or you have a 8900 that isn't a TMo branded.
Is this the case with all phones working on other carriers networks? If so, it explains a big problem I'm having.
I have a Vodaphone branded phone, unlocked. I run on the Three network in Australia. Though the phone is unlocked, your explanation seems to fit.
I am wondering if I can wipe the original operator's software and install the Three software on the phone - this should solve my problem.