I opened the international roaming function, and I called home to remind me to turn off my phone, but I couldn't get the text message. What is the reason?

Take Henan business as an example, 1, and inquire whether there are international/Hong Kong, Macao and Taiwan roaming services (including basic functions, internet access functions, etc. ) It's already open.

2. When roaming to different countries and regions, you must choose a mobile phone that supports local standards. For example, if you roam to America, Canada and other American countries, you need to replace a three-band (supporting GSM900Mhz, DCS 1800Mhz, PCS 1900Mhz) mobile phone. If you roam to Korea, Japan and other countries, you need to rent a plane to roam.

3. After arriving in the visiting country, the general mobile phone will automatically search for the name or network code of the local mobile operator. If not, you need to enter the "Network Selection" item in the phone setting menu, select "Manual Search Method" to search the local operator's network and try to log in.

4. Check whether the mobile phone has set the outgoing call limit, and cancel the outgoing call limit.

5. Check the settings of the mobile phone and open the "Send local phone number" item.

6. Use the correct dialing method: "00"+"country code"+"customer number" or "+"country code+"customer number".

7. Check whether the balance of mobile phone charges is insufficient, which makes it impossible to use.

Please consult online customer service for details.