First confirm whether you need to go online. If you need to go online, apply for international roaming and activate data international roaming at the same time. Since setting up call forwarding may affect normal roaming services (such as being unable to log in to the network), or cause two-way international long distance calls, leading to unnecessary disputes over phone charges, you should cancel the call forwarding setting before going overseas to avoid the high cost that call forwarding may cause. amount of fees. When roaming internationally, plug the 3G card into a 3G phone and the 4G card into a 4G phone. Before China Telecom mobile users roam abroad, please prepare the corresponding mobile phone terminals to ensure normal roaming abroad. Supports all-Network mobile phones (GSM\CDMA\WCDMA), dual-mode mobile phones (supports CDMA\GSM), and single-mode mobile phones (GSM) that support domestic G networks. The roaming area is a country covered by GSM or WCDMA network. Please put the UIM card into a GSM or WCDMA

or C/G dual-mode mobile phone to use it. Some dual-mode mobile phones have GSM card slots and CDMA card slots. When using such mobile phones to roam in the GSM network, please ensure that the UIM card is inserted into the GSM card slot.

Set up voice and data on your mobile phone before going abroad:

1. Android 5.0 mobile operating system setting operation guide:

Android 5.0 and subsequent versions of the system are widely used in 2014 -Mainstream Android phones produced in 2016. We take the Huawei P8 Telecom Standard Edition as an example (the operating system is EMUI 3.1 based on Android OS 5.0) to introduce to you the international roaming setting operations of Android 5.0 system mobile phones:

Card settings: When roaming, you The Tianyi UIM card is inserted into the card slot that supports GSM. (For newer dual-network dual-standby mobile phones, it is recommended to use card slot one that supports C/G dual-mode)

For example, Huawei P8 Telecom version: the main card slot supports C/G dual-network and the secondary card slot Only supports G network standby. The lower card slot supports Nano SIM card, and the upper card slot supports Nano SIM card or Micro SD card. The lower card slot is the primary card by default. For other models, please refer to the user manual.

Automatic network selection: "Click "Applications" → Settings" → "International Roaming Settings" → "Card Slot 1".

Generally speaking, as long as the card slot of the inserted card is turned on in the international roaming settings of the mobile phone, it will automatically connect to the preferred operator's network when you turn it on after arriving abroad. But everything has surprises. What if it doesn’t connect? You are required to perform manual network selection.

Manual network selection: Click "Application" → "Settings" → "International Roaming Settings" → "As soon as the card slot is opened" → "Manual network selection" → "Network Operator" → "Manual network selection" →Select "Preferred Operator" to register.

Note: During the network selection process, it is recommended to turn off the "Mobile Data" and "Enable 4G" switches.

Turn on Mobile Data: Log in normally. When the network is normal, the data roaming switch does not distinguish between C/G networks, so you only need to turn on "mobile data" to access the Internet.

Tips: It is possible to use your smartphone in standby mode. It will generate a large amount of data traffic, such as customized mobile newspapers, download functions of mobile newspapers, electronic map download functions of navigation, automatic software updates, email push functions, etc. Therefore, it is recommended that you turn off international roaming when you are not using the network abroad. data function to prevent high data roaming charges.

2. Operation guide for international roaming settings for iOS 9 mobile phones:

In September 2015, Apple released the iOS 9 mobile operating system. , the Apple iPhone 6s and 6s plus released at the same time are equipped with iOS9 system by default. Other iPhone models can also be upgraded to iOS 9 by themselves. We take the Apple iPhone 6s Telecom version as an example (the operating system is iOS 9) to introduce iOS 9 to you. International roaming setting operation of system mobile phone:

Card setting: When roaming, put your Tianyi UIM card (Nano card) into the iPhone's card slot tray and insert it into the phone automatically. Select a network: Click "Settings" → "Cellular Network" → "Roaming" → turn on the "Voice and Data Roaming" switch

Complete the above international roaming settings for the telecommunications version of the iPhone, and turn it on directly after arriving abroad. It will automatically connect to the preferred operator network.

Turn on mobile data: After completing the above roaming settings for your iOS phone, just turn on the "Data Roaming" switch and you can use roaming normally. Data services such as web browsing.

Tips: Smartphones may also generate large data traffic in standby mode, for example, customized mobile newspapers, mobile newspaper download functions, and electronic navigation. Map download function, automatic software update, email push function, etc. Therefore, it is recommended that you turn off the international roaming data function when you are not using the network abroad to prevent high data roaming charges.

/ckb/knowledge_detail/gz/20121212/24593