Is sentence correct?

Normally, Mobile phones can not send sms messages to telephones but i found that my mobile phone can send sms messages to telephones. So I would like to ask that you check this problem with the technical team. my question is "Could you please check why my mobile phone can send sms messages to fixed lined telephones (called landline also)?"

Marked

Is sentence this paragraph correct?

Actually, Mobile phone can not actually send sms text messages to telephones (fixed- land line phones). but i I found this to be a problem is mobile phone can send sms to telephone. So I would like to ask and check about this problem with to a technical team for this problem. my My question is "Could you please check explain why mobile phones can't send sms text messages to land line telephones (fix-line)?".

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Corrected

Is this paragraph correct?
Mobile phone can not actually send text messages to telephones (land line phones). I found this to be a problem. So I would like to ask about this problem to a technical team. My question is "Could you please explain why mobile phones can't send text messages to land line telephones?".

I'm afraid that it is not possible to send a text message to a land line telephone, because that's not a feature supported by a land line phone! Some land line phones don't even have screens, so even if you could send a text message to them, you would not be able to read it!

Is Are these sentences correct?

Actually, mobile phones can not cannot send sms to telephone (fix-line phone) to landlines but I found problem is that mobile phones can send sms do so to my home telephone. So I would like to ask and check out this "problem" with a technician team for this problem. my question How can I phrase it properly as a question.  "Could Can you please check why mobile phones can send sms to telephone (fix-line) to my landline?"

Most probably your home phone is equipped with the smart features of a cell phone.

Is this sentence correct?

Actually,My mobile phone can not send sms to a telephone (fix-line phone), but I found this problem with  mobile phone. Can't send sms to a telephone. So I would like to ask and check this problem with technical team for this problem. my question "Could you please check why mobile phone can`t send sms to telephone (fix-line)?"

Can not = contraction " can't ".

A pilot , a car ,etc

Is sentence correct?

Actually, Mobile phone can not send sms to telephone (fix-line phone) but i found problem is mobile phone can send sms to telephone. So I would like to ask and check this problem with technical team for this problem. my question "Could you please check why mobile phone can send sms to telephone (fix-line)?"

I would say, "Can you please check why mobile phones can send sms to land-line telephones?"