Joke Collection Website - Blessing messages - Why can't I make phone calls and send text messages when the mobile phone traffic is set to 4g?

Why can't I make phone calls and send text messages when the mobile phone traffic is set to 4g?

Different places, different situations,

The local business hall can give the real answer.

Just asking.

The method is as follows:

One: Call the customer service of China Unicom, China Mobile and China Telecom.

Two: then manual service,

Three: Ask the number of the local business hall, and then call the business hall to ask.

Remember to adopt before you go, thank you!