MCC/MNC 网络代码 是什么意思
手动选网时，有些手机显示的是数字而不是名称：前一组是国家代码，后一组是运营商代码。遇到这种画面，先对照该国的运营商清单再选。
| What appears on screen | What it actually means | What to do about it |
|---|---|---|
- 1
- 2
- 3
- 4
- 5
- 6
优点
缺点
| What you observe | The likely cause | Where to fix it |
|---|---|---|
常见问题
Does seeing digits instead of a network name mean my phone is faulty?+
No. The digits are the network's real identifier, the one mobile systems use among themselves, while the brand name is only a label the phone paints over it from an internal table. When the handset has no name for that code, which happens often with foreign or smaller networks, it shows the raw number instead. That is normal and has no bearing on signal quality.
Should I always pick a network manually when I travel?+
No. For everyday use the automatic system does better, because it keeps moving between networks according to signal quality without you noticing. Manual selection is a temporary troubleshooting tool, and once you are done you should turn automatic back on straight away, since being stuck in manual mode is a common cause of losing service after moving between cities.
How do I know which networks in the list my plan can actually use?+
The on-screen list only tells you which networks the phone can hear from where you are standing; it says nothing about entitlement. Which networks a plan covers in a given country is stated in the product details of what you bought, so read that before you travel. If you are unsure, contact us with your order reference and destination and we can check it for you.
Manual selection says it cannot connect. What next?+
Work down the list one entry at a time, since some audible networks are simply not part of your plan's agreements. If none of them attach, switch back to automatic and check three things in order: whether the profile is actually enabled, whether data roaming is on, and whether the plan's start date has arrived. Most cases turn out to be one of those three.
What can the first three digits tell me near a border?+
The first three digits are the country code, so if you are near a border and the network you are attached to starts with a country code that is not where you are, the phone may have drifted onto a neighbouring country's network, which could fall outside your plan's coverage. This is exactly the case where manual selection helps, though you should still compare against the destination's operator list before choosing.
Do older phones still have a manual network menu?+
Generally yes, because it is a basic capability of mobile systems, though the name and location vary by manufacturer and operating system version. The quickest route is the search box in the settings app with the word network typed into it. If the handset is old enough that it has no eSIM support at all, you will not be able to install an eSIM plan in the first place, so check that before buying.