Haier mobile phone M158 Guatemala

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Haier mobile phone M158 Guatemala is setted to lock Tigo sim card only, other operator's card can not be used in M158 phone.
Now, we find the right way how to unlock it after several trying, we decide to share it with you.
Please download the attached file and follow guide to do it.
Remember, you must follow guide to act one by one, otherwise, you may make the phone died.