What you did with my phone? I can't make calls and nobody can't call me?

[Chalkychap]

Is your plan paused?
Do you have an active plan?
Perhaps, best to ask the SMARTY customer support team about this issue, @VytasSi_2626868. 

Community members can't look at your SMARTY account, so have a web chat with a SMARTY adviser. 

Do this online at https://smarty.co.uk/contact - then scroll do to "Start a conversation".

[MSF]

@VytasSi_2626868 In addition to what @Chalkychap  says, have you tried another sim (perhaps from a friend) in the phone just to check that the problem is not with the phone itself? Have you also taken the sim out, cleaned it and then checked that you put it back correctly?