Why do I need to add 86 to send text messages to my mobile phone?

+86 belongs to the area code of China, so we don't need to add the area code at all, just like our fixed telephones all have the area code, but it is the same reason that fixed telephones between cities don't need to add the area code. Now mobile phones can make local calls without area code, but the tariff with area code is the same. So even if you press +86, you will be charged according to the charges of ordinary mobile phones, without long-distance and other charges.