How does mobile integral exchange phone bills by sending short messages?

Send a text message to edit HF+ to calculate the amount to be exchanged to 10658999.

Points are given according to the cost of your recharge this month. Ordinary customers give a one-to-one ratio. For star customers, there are usually extra gifts. A disguised marketing method used by merchants to stimulate consumer consumption. For example, how many points can be redeemed for a product. Ways to get points: shopping, doing tasks, participating in certain activities, etc. It can also be understood as a core concept in calculus and mathematical analysis.