Increase battery life by 30% because phone receives less signal from network. It also help if u want to use GPRS and the service is not responding or too slow. Increase signal strength, better signal reception. *#3370# – Enhanced Full Rate Codec (EFR) activation. Shows life timer of phone (time passes since last start) Displays the date of the last repair – if found (0000)ĥ. Displays (if there) the date where the phone was purchased (MMYY)Ĥ. Displays the Month and Year of Manufactureģ. *#92702689# – takes you to a secret menu where you may find some of the information below:Ģ. Only in the newer devices that support WLAN *#62209526# – Display the MAC address of the WLAN adapter. *#67705646# This will clear the LCD display (operator logo). *#06# for checking the IMEI (International Mobile Equipment Identity). Click here and find out more information about secret codes. Let's get access to secret information about MICROSOFT Lumia 640 XL. Check out how to enter hidden mode and use advanced options of Windows Phone 8.1. Here you can find all secret codes for MICROSOFT Lumia 640 XL.
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