ref cellular network

Hi everybody thank you so far for your msgs in reply to my previous msg, what i 

would like to confirm is that my present phone is working fine and that my network is ok,

the trouble is that my older phone which is a smartphone i bought a good few years back,

and i thought i would see i can get it up and running again, as i had 2 smarty sim cards from when i joined 

smarty i thought that i could try them in the older phone, i had restarted my older phone got eveything

working. google, email, pictures, my broadband providers password, but as i say the thing is that it does not seem to connect  when i try to ring out, and yet everything seems to be working fine, thanks once again for any info,