My wife has lte and i have wimax 4g. Her lte hasn't lit up in mandarin, op, downtown, jax bch, or sothside. However, last week my wimax was on fire. I got 15 mbs in mandarin and 72 ms ping. Best ever before was 8 mbs and well over 100 ms ping. That didn't last. Wimax now back to 2-7 mbs. Don't...