How to answer the phone after roaming in Mongolia?

Mongolia can use C and G networks to roam. It is recommended to take a dual-mode mobile phone or G /C mobile phone to visit. The free customer service hotlines are C and G networks. C network: call Chinese mainland "0086 called number" 3 1.99 yuan/min; Call roaming local telephone "direct dial called number" 7.99 yuan/minute; Answer the phone 5.99 yuan/minute; Send a short message to "directly enter the other party's number" 1.99 yuan/in Chinese mainland, and receive short messages for free. G network: call Chinese mainland "+86 called number" 3 1.99 yuan/min; Call roaming local telephone "direct dial called number" 7.99 yuan/minute; Answer the phone 5.99 yuan/minute; Sending a short message to Chinese mainland "directly enter the other party's number" is 2.89 yuan/piece, and receiving short messages is free. (The above charges are applicable to Tianyi UIM card for reference only) For more service concessions, click "official website" below to answer your questions.