After hard reset on my Lumia 520 its unlocked but there is shown no service and I am able to only make emergency calls, why?

[WPCentral Question]

after hard reset on my lumia 520 its unlocked but there is shown no service emergency calls only

unlocked after hard reset but no network is shown in any of my sim card

 

[ratsttam]

Re: after hard reset on my lumia 520 its unlocked but there is shown no service emergency calls only

What carrier branding is your phone?
What method of unlocking did you use?
What carrier(s) sim card(s) have you tried?
Are you certain your sim card is inserted in the correct slot (ie: not in the microsd slot)?