By referring to 3G speed alongside 4G LTE speed in the plans description, it is causing major confusion for new customers deciding which data plan to select. Very often, there is confusion between speed and network connectivity. In particular, new customers tend to associate 3G plans with connection on the 3G network only. It is suggested to take the some of the details from the fine print and put it right up front. For 3G speed, refer to it as LTE data at 2.5 Mbps max download. For the 4G speed, refer to it as LTE data at full download speed. This way customers will understand that both types of plans are actually LTE data, with the difference being the speed limit only.
By the way, it's quite misleading to refer to 2.5 Mbps as 3G speed. HSPA is far more capable than that.