Sim card not detected after installing CM13 (unofficial) on xperia l

i'm new to android. I recently bought a xperia l phone from my friend in which he had Cm11 installed i decided to upgrade to cm13 and it really messed up the phone.. the sim card was not detected and play store didn't work!!! so i came back to cm11 which then entered boot loop. So i decided to go with cm12.1. Now the pay services work like charm... BUTTTT sim not detected problem still persists!!! so can some one here gimme the link of the radio or modem files of xperia l c2104 or help me with any other solution for this problem... thanks in advance