I am currently a pioneer card of New Power SMS Package (Chengdu) and changed to a free combination package.

After successfully switching to a free combination package, your package belongs to Unicom's 4G package, and the traffic in the package belongs to 4G traffic, not 2G or 3G traffic. There is no roaming and long distance in the whole country, and a unified national tariff is implemented. If users choose domestic voice/video phone package, they need to select caller ID at the same time (showing extra charge, 6 yuan/month). If you don't choose voice package, you don't have to choose caller ID. If caller ID is not selected, there will be no caller ID function in the package and no caller ID fee will be charged.