I am Ah Qing, an electronics and computer enthusiast and a "universal repairman" with more than 20 years of repair experience. Here are some of my repair stories.
I was short of money and bought a radio and television mobile phone card, just to test the support of the radio and television mobile phone card on the old mobile phones at home.
The first one to come on stage is the iphone7. After the mobile phone displays China Radio and Television LTE for a short time, the signal returns to zero. Unable to access the Internet. After setting up APN, it has no effect, leaving it for future research.
The next one is Xiaomi MIX2. After plugging it into the phone, it shows HD China Radio and Television 4G and cannot access the Internet when browsing the web. To query the Internet, you only need to set the APN access point to cbnet to access the Internet. After pressing the operation button, the Internet access is normal.
Reference material: Manual adaptation of China Radio and Television 5G network to iOS and Android - Zhihu (zhihu.com)