@JagdishDudhate hi, maybe give it a try with the "solution" using a beta firmware posted on comment #8 best regards

Please check the link I stated in my comment. It fixed the issue for me with o2 Germany as well. But as stated on your own risk. :-)

@ParmeshwarP fixed issues with not being able to receive sms or to watch them by installing BETA firmware... https://community.tp-link.com/en/home/forum/topic/230750?page=2 on your own RISK !