I bought a gsm unlocked sprint htc m8 from a 3rd party vendor recently. (It was only after the purchase that i realised it was a sprint phone). The phone worked pretty well on my network until i moved to a different city. The trouble is that data doesn't work here for some reason and there is no data roaming option on the device.
The vendor has agreed to sort it out but it will be quite a while before I go back and give him the device. So i wish to try something on my own.
My research on here has yielded that I probably need to change a few settings in the default.xml under system/customize/ACC. Or there could a better way of enabling it.
So far, all the steps I need to take seem disjointed and therefore I'd like someone to please guide me through a step by step process on how to enable the data roaming option. I'm sure I'd be able to follow the instructions as I've previously installed a custom rom on my HTC One S.
The phone is not rooted, although it says "tampered" when i enter the hboot menu. In the same menu it also says "unlocked"
Let me know if you want any further information