Problem Flashing to Slim ICS or Slim Bean

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http://forum.xda-developers.com – Hello, I'm posting because need a little help, I was using Legend 5 KK4, but I decide to try Slim ICS or Slim Bean, but everytime I flashed the ROM no phone because no imei no baseband, and the folder /efs is empty. Then I back to stock with Heimdall One click I897UCKK4 and made a backup from /efs folder, after flash again Slim ICS restore /efs bakcup but no imei nor baseband. What can I do? Please any help would be appreciated. (HowTos)