1.Input *#06# on phone to query the corresponding SN.
2.You can get the SN from the giftbox or label of phone.
3.Please reset security password/Pattern Lock while depositing device. There is possibility of data or applications in the handset being formatted during repair work, hence please take back up of all the data and applications and it is advisable that you should delete all the data from the handset to maintain privacy of your data. Huawei and its authorized service center will not be responsible for any loss of data or application. Please remove storage media such as SIM, memory card. You hereby accord your consent to Huawei to collect, and share your updated information, if any such as your name, phone number, SN number, etc. for the purpose of user satisfaction surveys, analysis, product improvements, etc.