The issue of regional boundaries for mobile phone roaming, the question about mobile phone roaming

I'm the best business in Unicom, so I'm very clear about the network

You're right: If your kitchen is in City A and your living room is in City B, you're always roaming around your home

For example, if your living room not only occupies the network of city B, but also the network of city A, then it depends on which urban base station (that is, something like a tower, which is used to transmit signals) that is closer to your living room, then the network of which city is stronger, you will be robbed by the strong network, if you use the network of the weaker side, then you will be robbed, and roaming

That's not possible because mobile phone carriers rely on cell towers to distinguish your area, and each tower has a range of about 5km

Generally, there will be a no-signal range between cities.

And you can judge your coordinates, and there is a signal positioning function.

They can know exactly where you are in the tower.

Moreover, the signal towers in different cities generally do not overlap.

Border roaming will be generated, and it will generally be returned!

Mobile phones to Hong Kong are international roaming.

Generally, before preparing to go to Hong Kong, a deposit is paid at the business hall of the mobile phone registration place to open the roaming service in Hong Kong, and the deposit generally ranges from 500 yuan to 1,000 yuan. The three major operators are all about the same.

It's more expensive to pick up in Hong Kong, I can't remember the specifics, although I often go to Hong Kong, but I never use it that way.

I bought a SIM card with one card and two numbers of China Mobile when I was about to enter the customs in Shenzhen, one card, one number in mainland China and one number in Hong Kong.

If you transfer your original number to the number in the mainland, when you arrive in Hong Kong, it will naturally be equivalent to calling to the number in Hong Kong. In this way, there is no need to pay any deposit, and there is no need to go to the business hall alone to handle Hong Kong roaming services.

This one-card-double-number card is charged according to the standard of the mainland in the mainland, and the operator who roams from Hong Kong to Hong Kong will be charged according to the tariff standard of Hong Kong, which is very convenient and cost-effective. If you call the mainland in Hong Kong, it should be yuan, and if you call Hong Kong's local dollar, the answer should be free.

If you don't understand, please ask!

Bring your ID card to the local business hall to open a dial for one minute to answer yuan per minute You can open two cities and one family to answer for free for one minute.

See if you have set up the roaming function in your mobile phone, and generally do not need to go to the business hall, I have encountered such a I hope it will help you! Give points.

What I can answer is that you have to call 10086 to open roaming, because your mobile phone card cannot be used, you can only use someone else's ** to call 10086 You have to provide 10086 customer service with your ** card password! If you don't know how much it costs, you can ask mobile customer service.

Eh, I see what you mean.

First of all, you don't need to open it when roaming, as long as there is a mobile phone signal, you can call**, but the **mobile phone service provider you call is defined as a non-attribution dial (recorded as roaming).

The second one is, "dial out your own mobile phone display limited to emergency services", this is your mobile phone has no signal or the SIM card is not recognized by the mobile phone.

Synthesize yours, "Someone else calls that number prompts that it is turned off, and you dial out the mobile phone to display emergency service only" may be that the SIM card is not recognized by the mobile phone, if you are sure that your mobile phone can search for the signal and the company name of the operator (China Mobile or China Unicom) is displayed on the standby screen, then it is a problem with the mobile, take the mobile phone to find the mobile. If you don't have one of them, there is something wrong with your phone, find a repairer to fix it. Complete.

If it is a mobile Volkswagen card, you need to activate roaming.