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Try to keep the following two steps when you get this type of error. 1.Check whether it's your sim card is properly inserted or not 2.Your mobile is restricted by some network.So try to unlock it. If it's network locked means try to unlock your HTC Salsa mobile phone using Unlocking4u.com Here you can unlocks your mobile at low cost.
First All Check: 1.Confirm whether same sim card is working in other h.s or not. 2.Make sure the sim slot is o.k. only try these two. 3.If all the above steps fails, check the SIM card connector pins for damage. if so try to get serviced. 4.if ur sim card is good then it is problum form sim card ic u have u raplace it with SMD. u can make it jumper mean u can fix this prob with out sim card is for this contact. 5.take sim connector slight up by pin then cheak by inserting sim. 6.hot air gun on sim i.c. then cheak it. Last Option: IF make sure that the sim card hasn't been damamged at all sO Please You Go to Service & Sim Office and Get the Duplicate Sim Same Your No From Office Oprator Problem will Solved Quickly
First Option: Phone in the Other Sim and check the Phone Network Signal If Network Signal Problem not Solved So Secend Option: Your Phone Network IC Fault So Please change Network IC And Network Signal Problem will Solved if it is there isn't much you can do on this side of the network. Contact your phone company.
hi im josh in cebu phils. may i help you? As a mobile phone techinician, Friend i will say that the problem centers on your phone and not on the sim card. You phone is locked to the network of that SIM or commonly mentioned "not open line" thats why the software or the phone doesn't recognizes the SIM you are using because it is locked. To solve this problem you may go to your network provider and ask for assistance of opening the line of your phone so that you can use any sim cards you wanted. and your phone will now be unlock or "openline".Thats all friend hope i helped you good luck
Sounds like the phone hasn't been unlocked properly. I had a similar problem and eventually just changed my sim to the original phones network. This solved all problems but i don't know wether this is the full solution to your issue. I tried to help best as though dude.
- I switch off my k790 and changed a sim card but could not turn it
on. Whonever I press the power on button a red light flashes near the
infrared port.The same problem occurred whenever I inserted the data cable and my computer does recognised my phone.-