Which is the cheapest, Qingdao Mobile or Unicom?

I just gave my grandmother a Qingdao Mobile Shenzhou Home Card, with a monthly base of 6 yuan, including full-time calls in 3 yuan and caller ID in 3 yuan. All-day call charges will be deducted at the beginning of the month, and the caller ID will be deducted by 10 cents a day. There is no short message monthly, the short message in the network is 0. 1 yuan, the short message between networks is 0. 15 yuan, the call in the community is 0.25 yuan per minute, and the call outside the community is in 0.3 yuan. Other areas are outside the community, such as Jiaonan and Jiaozhou. Long-distance calls cost 7 cents every 6 seconds+community calls. You can set a Qingdao local mobile home number. Every month, two Yuan Bao call the home number for 50 minutes (these 50 minutes are all callers), and local calls are free. Roaming for one minute in 0.6 yuan, roaming for one minute in 0.4 yuan. This card is most suitable for the elderly. Do it quickly, hehe, I hope I can help you!