An overview of mobile network trends

Because I want to buy a mobile phone recently. Because the mobile 2g is really not reliable. Last night, mobile 2g signal erratic, various connections disconnected ... Daughter-in-law son see me in that yelling unkind, so with Unicom 3g opened a hot spot to me .... The feeling of legs instantly made me fly. So I started buying a cell phone, or changing a card.

Just change the card too troublesome, mobile phone number has virtually become its own "network identity card" buy a dual sim, a mobile card, used to do their own network ID card. But what card does the other use? Move 4g? Move 3g? Unicom 3g? Unicom 4g? or a telecom 3g? Telecom 4g?

After a few rummaging, tidy up the following

Mobile

1, the number of base stations, the largest signal coverage area

2, in a large-scale compression 2g network from GSM transfer to gsm1800 (from the low frequency to get high-frequency up, and high-frequency signal various instability. This could be the reason why my phone's 2g signal is messy in the wind.

3, 3g speed is the slowest, about 0.2m/seconds (because WCDMA is connected with, so the move can only crash the choice of TD-SCDMA)

4, to the 4g network to add 80w base station, so that the total to reach the million base station

5, 4g technology using time-sharing technology.

6, the number of users, 750 million (I do not know which year, but certainly the same period)

China Unicom

1, the number of base stations is less than mobile, slightly larger than telecommunications

2, 3g speed fastest, about 7.2m/seconds

3, for the 4g base station expansion plan is unknown, but want not to build.

4, 4g technology using crossover technology

5, the number of users less than 150 million (do not know which year, but certainly the same period)

Telecom

1, the number of base stations is slightly smaller than unicom

2, 3g speed is flat, for 3.1m/s

3, the signal is particularly stable, because it took over the Unicom CDMA base station in 2008, so the number of base stations is still many. (3g can be used in some subways)

4, 4g technology seems to be similar to Unicom

5, the minimum number of users, 4500w (do not know which year, but certainly the same period)

6, to add 60w base station for 4g network.

7, low cost, 2g of some equipment can be upgraded to 3g (CDMA2000), it is said from 3g can also be upgraded to 4g ... That's a good deal.

So

Network angle:

From coverage, Mobile is the best basic 100%, telecom next 90%, Unicom covers more than 300 cities

From the speed, Unicom "telecom" mobile

From the speed of stability to the telecommunications "Unicom" mobile

Call angle: It should be mobile, some places may also be the best, or the best telecommunications, but should be the broadest range of mobile support

Then, I think, I later selected equipment, is to China Mobile as their identity ID, and then, the auxiliary use of Unicom 3,4g, or telecommunications 3,4g, after all, for us, too fast speed, actually not practical, stable. (unless which carrier dares to offer a monthly subscription)

PS: From the Enterprise management, China Mobile is far better than Chinese unicom and telecom. It may be because China Mobile is a branch of China Telecom. More energetic and creative.

Again PS: Nikki sister Millet, why do you not out of dual-SIM Telecom edition Millet 4!!!!!! I'd spend 2500 to buy!!!!!!!!!!.

Re PS: User habits are very important ah. I use my daughter-in-law's Samsung phone all kinds of not accustomed to, what can not find.