The mainland sends text messages to Singapore, and Singapore sends text messages to the mainland ... what is the price? Also, do I have to add any prefix to send text messages?

1. The price is different, depending on what company and package you sign. The approximate price is about 1.5 cents.

2. The standard for domestic issuance to Singapore is RMB 1.

3. Same as above, the price is different, depending on what company and package you sign. Every company has its own international direct dial telephone. It will be cheaper to dial that number first and then add an international number. It is about five times cheaper for Singapore to call China than for China to call Singapore. There are two other options: phone cards, which are sold in general grocery stores and newsstands. There are two kinds, one is called direct dial card and the other is called callback card. It will be cheaper to use this card than to dial directly back to China by mobile phone.

4. Singapore should use+8613 * * * * * * to send a text message to China, and 0065 * * * * * * to send a text message to Singapore. 86 is the area code of China and 65 is the area code of Singapore. But when texting, Singaporeans use+and China uses 00. If you don't use 00, some companies can't send it.

5. In Singapore, you can use wifi to surf the Internet with the mobile sim card in mainland China.