very easy no T Mobile pre loaded bloat apps plus you will not get the built in video calling that is baked into the t mobile firmware via the phone dial pad volte wifi calling and all the LTE frequencies are the same ... you will get what ever Samsung pre loads with no carrier firmware. As soon as you insert the sim card the Samsung firmware installs all the parameters for t mobile network such as wifi calling and Volte. No video calling since as stated above its part of the T mobile variant hope this helps
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