As I can convert rom AT&T to upgrade international - AT&T HTC One (M8)

Hello, someone can guide me as I change the rom AT & T to upgrade and if international networks have problems with?

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Unlocked SIII has no 3/4g with T-Mobile - Will a custom Rom help?

I have a friend who bought an unlocked SIII that supports GSM so he can use it with T-Mobile. However it doesn't have the radios to connect and get 3g or 4g. Will rooting and installing a custom rom or give him this feature? I would think that the hardware supports it but I'm not sure. They do list 3g for AT&T but only 2g for T-Mobile. Here is the phone he bought: http://www.newegg.com/Product/Product.aspx?Item=N82E16875176412
Does anyone have experience with this?
Flash stock rom with correct modem and CSC for your location .
Custom rom will not have correct modem and CSC in all probability .
jje

[Q] How to convert to dev. / international edition?

Hello, i have a Tmo HTC One
so i want to convert to Developer edition or International version (UK) to receive OTA updates quickly and directly from HTC.
So from where i have to start?
I didn't do anything before (still noob )
No one can help me?

International Firmware on T-mobile variant

I want to convert my T-mobile (sm-g925t) to the international version so I can get OTA updates faster thatn T-mobile users. I know I can just flash International ROMs but I'd rather have the stock firmware instead. Does anyone know how to convert from T-mobile to International? is it even possible on Galaxy devices? I've done a tone of research and I haven't found anything that can help me with this. It is possible to do this on HTC devices, for example I converted my T-mobile HTC One to Developer Edition HTC One by changing the MID and CID, but I don't know about Samsung devices.

T-mobile firmware on unlcoked ATT GS6?

Hi,
I'm a T-mobile customer and recently got an unlocked ATT GS6. The question here is can I flash the most recent Tmobile firmware (G925TUVU2COF8) onto the phone? I really want the 5.1.1 battery and bug fixes. Would I be able to just use Odin to flash the rom?

URGENT: What stock ROM to use - original carrier or current carrier?

Hi all,
I need to reflash my stock ROM (HTC One M9). As usual, there are a number of ROMs available based on carrier. The phone was originally Rogers when bought, unlocked, then placed on the Virgin Mobile (Bell) network.
Should I flash the Rogers ROM or the Bell ROM?

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