@Amar255 Hi, did you make/receive calls via Jio APPs? I used to see that Jio voice service is based on VOLTE but Archer MR600 did not support VOLTE....

@elgassi Hi, The new EE card is a local SIM card, not an international roaming card, right? Could you please refer to this link and help me confirm which case is quite like yours: [Troubleshooting]No...

@Twincab Hi, as for the SMS issue, please have a look at this link: [Solution] Cannot read SMS messages on TP-Link 4G Routers

@praveenvjs Hi, we did not sell Archer MR600 in the USA or Canada. So it hasn't been tested which provider's LTE bands are supported.

@SophalKkl Hi, based on the current description, it is more likely to be caused by ISP. Could you please refer to this link and tell me which case is more like yours: [Troubleshooting]No internet...

@MR600jio Or, Please also have a look at the suggestions on this link: Archer MR600 v2 manual band selection giving error code:89534 no available band