The signal of Beijing Unicom 186 is too bad, and it is often disconnected.

Yes, I connected the mobile phone with my mobile phone. I stayed in Changping for a long time, in the north of Huo Ying and the suburbs of Changping. In some places, the signal is poor. My experience here is that mobile is the worst, China Unicom is the second, and telecom signal is the best. Of course, this means that both 2G and 3g are poor.

The advantage of good telecom 2G signal is not because there are many base stations, but because of CDMA technology and 800 low-frequency and long-band signals in the signal frequency band, so the signal strength is large and the coverage is large, so other mobile phones often have no signal, but the telecom signal is good.

But 3G is a high frequency band, and the 3G mode mainly depends on the optimization of the base station. . . The suburbs are finished. . .

Of course, when the 3G signal fails, the mobile phone will automatically switch to the 2G signal. So calling and texting will not be affected. SMS is basically in the 2G frequency band, and 3G is used for Internet access, data transmission, special applications and other services. . .