What tablet computers can use telecom cards?

Apple, Samsung, Huawei and Xiaomi all have telecom tablets. When purchasing, check the network standard of the tablet. As long as the CDMA network standard is supported, telecom cards can be used.

CDMA is a spread spectrum communication with the following characteristics:

(1) has strong anti-interference ability. This is the basic feature of spread spectrum communication, which is incomparable to all communication methods.

⑵ Broadband transmission, strong anti-fading ability.

(3) Because of broadband transmission, the power of the useful signal transmitted in the channel is much lower than that of the interference signal, so the signal appears to be hidden in the noise; That is, the power spectral density is relatively low, which is beneficial to signal hiding.

⑷ Using the correlation of spreading codes to obtain user information has strong anti-interception ability.