I can't send text messages with my new SIM card.

Then, the number of the SMS center is correct.

What? You don't know? I don't know, either. But the customer service will know, call! It's free anyway!

Finally, if you still can't send it, call me.

In the SMS settings, just select "GSM only" as the SMS transmission mode!

The above methods are definitely effective for domestic mobile phones.

There is no transmission mode selection in the SMS settings of some Nokia phones, so "Use Packet Data" can be turned off.

To sum up, why is there such a problem as "the number of the SMS center is correct, but you can't send SMS"?

Some people may wonder why you can only reply to messages when you use them.

Maybe I accidentally changed some settings in the SMS settings, such as setting the information transmission to GPRS. I can't send text messages in this way at present.

Only GSM mode can be used.

It is unlikely that the smart phone will be infected with virus, mainly because the system is not compatible with the extended software, or the system memory overflows, and information cannot be sent.

After the smart phone takes out the memory card, format the phone. The problem of smart phone is too complicated …