If you are a Bharat Sanchar Nigam Limited BSNL mobile network and facing issues like not able to send sms from BSNL then below mentioned could be one of the reasons for the failure of sending or receiving sms message, below reasons applies to both BSNL Prepaid and Postpaid customers.
Unable to Send SMS from BSNL
BSNL SMS Problems:
Reason 1 : If you have a new BSNL sim then you will not be able to send sms from BSNL for 24 hours, her the New BSNL sim can applies to when upgraded from 3G to 4G sim, when your mobile phone lost/stolen then you take a new sim and when you have done a Mobile Number Portability MNP from different mobile network to BSNL.
So wait for 24 hours to start sending sms from BSNL. If still have queries or questions then contact BSNL mobile network customer Care.
Reason 2 : Wrong BSNL SMS center number in your Mobile Message Settings -> Message Center Number, check this link for BSNL SMS Center Number State and Circle Wise and update the correct BSNL message center number based on your location or circle.
Reason 3 : One of the reason could be you have not send any sms from your BSNL mobile number to anyone from the last 6 months, if you do so then chances that BSNL may deactiate outgoing sms on your BSNL mobile number, contact customer care of BSNL by dialing 198 or 1800-180-1503 and request them to activate sms message service.
Reason 4 : Keep your BSNL mobile network in Manual mode network, or vice versa if it is in Manual keep it to Auto Network, then restart the mobile and try to send the sms.
Reason 5 : If you are on BSNL 4G/LTE network change the network to 3G or 2G then restart mobile and send if you are able to send sms on BSNL phone.
Reason 6 : Check if your mobile has correct Date and Time, if the date and time is wrong sometimes the BSNL mobile network will not be able to sms.
Unable to Receive SMS on BSNL
Not able to receive sms on BSNL
Not receiving sms BSNL
Reason 1 : New BSNL sim takes upto 24 hours to start receiving sms, you will not receive any OTP from any provider until 24 hours.
Reason 2 : You might have activated DND service on your BSNL mobile number.
Reason 3 : Message storage might be full, delete older sms and check.
Reason 4 : Change network mode from 4G to 3G and restart mobile then try.
Reason 4 : Wrong Date and Time on your Mobile phone