i am using bsnl 3G sim in it but few min it says sim cdard error and agian if i restart it get wrkd and after few min it says sim card error. other netwrk sim wrking gret. is it fault in my sim...

sim card

look at this issue

while sim is okey and working great in phone and usb modem but in this router if i put that sim for a while it get worked and after few minute it says sim card error ,please check if it in good...

yup there is option click 3G ONLY OR 4G ONLY/\

bug in firmware tplink look at this issue n fixed it release new firmare