While many T-Mobile customers may be champing at the bit to get their hands on LTE, some might be content just to see faster HSPA+ speeds at all. Which is why we applaud the carrier's latest effort at spreading its "4G" joy to five new metros, notably to large swaths of Chicago and Southern California -- Sacramento, Fresno and Reno make up the rest. The speed boost is just one upgrade; other enhancements include improved signal strength and better coverage inside buildings. Along with earlier expansion effor