HTC India — 128k sim card not supporting in htc one x+

Address:

New Delhi, Delhi, 110095

I got the sim card replaced from 64k sim to 128k sim and after inserting the 128k sim in my phone, i cannot find network but when i insert the same sim in any other phone it works.
It seems the phone is not supporting 128k sim, i went to htc service center and there they said that they do not even have the software for this phone and said that nothing can be done and advised me to use the phone to just do nothing as the problem cannot be sorted.
I asked airtel to send me a 64k sim card but even they denied as they are not producing any 64k sim cards anymore.
Please take necessary steps as i cannot find any solution and the phone is just being used as a toy now.