Thanks for posting this. I recently had hot dog juice squirt onto my blackberry 7290 and sent it off for repair leaving me to purchase a used one from a ebay seller. My problems started when I tried using Yak-On but received many APN errors. Contacted Yak-On after unsuccessfully talking to Cinguar blackberry support, Yak-On did try to be very helpful but failed several times to get it working. After countless searches on this site I finally came across this thread and I must tell you, THANKS!! I followed the directions and presto! Yak-On works! I emailed the Yak-On support person who was helping me and told him about this site.