Chosen Solution
Hello everyone im new here. I had a problem in the LG G5 Sim holder tray the gold pins was damaged and i wanted to replace myself and fix by buy new sim tray and solder it. I had watch the similar video from YouTube for replace it. I had remove the sim with hot air and flux but i pull by force and the silver contact pads break off. I read and tried to scratch and reveal a copper near the empty tab and fill with solder paste and some with solder rod. After i put the new sim holder it doesn’t work the sim and the sb card. Before sd was working but no sim. Do i must clean all and remove with solder wick and buy silver conductive adhesive to fill the empty tabs? Update (10/23/2018)
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Kudos for trying a micro-soldering repair! The trick with lifted pads is to create some tiny jumpers. You had the right idea with scratching the adjacent trace but the solder won’t hold on to anything if you just apply solder paste to the hole that used to have the pad. You need to create a link between the trace and the pad you are trying to rebuild. The problem with this approach is that sometimes the jumper is so short that when you solder the device on it, the jumper moves around and can disconnect. The trick is to use a UV-curable solder mask as that resists heat (epoxy doesn’t work) so that the jumper will be held in place while you solder the device onto it. Check out an examples below: UV-Curable Mask not applied (yet)
UV-Curable Mask applied
