https://community.48.ie/t5/Other-Help/Unblocking-sim/m-p/33877#M12112 <P>Why do you need to use the old SIM when the new one works?</P><P>Is it because the two SIMs are different sizes/form factors (e.g. micro versus nano) or something?</P><P>If you really need to switch back to the old SIM then you'll need to ask 48 support to sort this out for you:</P><P>&nbsp;</P><P><A href="http://www.48months.ie/help#ask-a-48-agent" target="_blank">http://www.48months.ie/help#ask-a-48-agent</A></P><P>&nbsp;</P><P>Hope this helps.</P> Mon, 16 Mar 2015 16:31:54 GMT dalyer 2015-03-16T16:31:54Z https://community.48.ie/t5/Other-Help/Unblocking-sim/m-p/33876#M12111 i ordered a replacement sim and activated i, but dont need it anymore. can i use my old sim again? Mon, 16 Mar 2015 15:39:07 GMT https://community.48.ie/t5/Other-Help/Unblocking-sim/m-p/33876#M12111 marleneellis88 2015-03-16T15:39:07Z https://community.48.ie/t5/Other-Help/Unblocking-sim/m-p/33877#M12112 <P>Why do you need to use the old SIM when the new one works?</P><P>Is it because the two SIMs are different sizes/form factors (e.g. micro versus nano) or something?</P><P>If you really need to switch back to the old SIM then you'll need to ask 48 support to sort this out for you:</P><P>&nbsp;</P><P><A href="http://www.48months.ie/help#ask-a-48-agent" target="_blank">http://www.48months.ie/help#ask-a-48-agent</A></P><P>&nbsp;</P><P>Hope this helps.</P> Mon, 16 Mar 2015 16:31:54 GMT https://community.48.ie/t5/Other-Help/Unblocking-sim/m-p/33877#M12112 dalyer 2015-03-16T16:31:54Z