I just did a hardware upgrade on Sunday afternoon from an iPhone 4 to an HTC One X LTE. I had to drop my 6GB $30 data plan for a 3GB LTE plan. They couldn't convert my 6GB plan from 3G to LTE.
The gist of it is, I have an LTE capable phone, I'm in an LTE coverage area, and I have an LTE data plan. But my phone is not getting LTE service. It's only showing 4G in the status bar.
When I did the hardware upgrade, the guy at the Rogers store just took my SIM from my iPhone and put it in the One X. I thought it had to be changed to a new SIM, but he insisted it didn't. Now I'm wondering if it really did, and that's why I'm not getting LTE.
Just wanted to share that I called Rogers and confirmed.with them that the reason I wasn't getting LTE service is because I was using my iPhone 4 SIM. Went to BestBuy and bought an LTE SIM and everything is working great now. Getting some crazy LTE speeds at my home in Surrey, BC.