MetroPCS T-mobile iPhone not getting Metro LTE, doesn't make sense

[cellulartalk]

So my GF has a T-mobile iPhone 5 that isn't getting LTE on MetroPCS. we've tried about 3-4 different types of APN settings... all keep her on 3G only, the LTE button is not even an option unless she put's in a T-mobile SIM Card. According to the T-mobile iPhone 5 specs she should receive LTE. ...

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Courtesy of WestNet Wireless
www.westnet.ca