in case of insert sim problem in Samsung Gt-I9070 it will show insert sim, sim not valid, and may not show signal.to solve Samsung I9070 Insert Sim IC Solution Jumper Problem Ways we have to do a few simple steps as given in this post.in first step replace you sim and try
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Samsung Gt-I9070 Insert Sim IC Solution Jumper Problem Ways Sim Not Working Sim Not Valid
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to check the sim line as shown below, check Samsung Gt-I9070 sim track you one by one carefully, try to make jumpers as contained in the image, usually after doing a good jumper and correct, the sim problem can be resolved, good luck.
Note: damage to Samsung Gt-I9070 sim problem / or sim ways, often there is damage to the connector sim, you only need to replace the connector, then your phone will be back to normal.