Mobile phones can send text messages to the internet, why can't they get out? That means I can't get through ...

Check the call settings to see if the outgoing call settings are correct. In addition, some mobile phones have phone charges, which will prohibit calls after reaching a certain limit. This needs to be reset by contacting the mobile phone, or by the owner himself. Or see if call forwarding is set in the call settings. If it's just a call failure, it's recommended to contact the other party to see if there is any call restriction or blacklist setting. If it doesn't work, it's recommended to check the card in the business hall to see if it's a mobile phone problem or a card problem. situation ...