Extra-Tools SPD Diag Tool v1.0 Free Download Latest VersionExtra-Tools SPD Diag Tool v1.0 is a small and very useful free tool for Spreadtrum and some MediaTek Android phones. This tool helps users and mobile technicians do important tasks like factory reset, reboot, power off, backlight on, send AT commands, and read IMEI information. Best part it's fully offline work no need internet for use this tool.I personally tested this tool in my mobile shop on different SPD phones. Sometimes customers come with dead display light issues, boot problems, or VoLTE disabled after flashing. This tool helped me quickly fix many small problems without using heavy software. It opens fast, connects easily, and does basic repair work smoothly.The latest version also supports sending custom AT commands for IMS and VoLTE configuration. This is very useful when VoLTE calling is missing after software flashing or FRP work. The tool is lightweight and portable, so there is no need for installation.Features of Extra-Tools SPD Diag Tool v1.0Free offline tool for SPD devicesSimple and clean interfaceTurn ON device backlight optionFactory reset supportedPower OFF phone directlyReboot device with one clickRead IMEI informationSend custom AT commandsUseful for VoLTE and IMS fixingPortable tool, no installation neededFast device connection supportCharging battery support optionSmall file size and smooth workingWhat’s New in Version 1.0First public release of Extra-Tools SPD Diag ToolAdded IMEI read functionAdded AT command sending supportAdded reboot and power off optionsImproved SPD Diag port connectionBetter compatibility with Android devicesReal Shop Experience and Tested ResultOne customer came to my shop with an SPD phone where the display light was not working properly after flashing firmware. The phone was turning ON, but the screen light stayed black. I used the “Turn On Backlight” option from this tool, and the issue was fixed in seconds.Another customer had VoLTE missing after software flashing. Normal calls were working, but Jio VoLTE icon was not showing. I connected the phone in Diag mode and used the AT commands inside this tool. After rebooting the device, IMS registration started and VoLTE worked again.For simple repair work and testing, this tool is very useful because it saves time and works without internet connection.Supported FunctionsTurn On Backlight: Fix display light issue quicklyFactory Reset: Remove user data and reset phonePower Off: Shutdown device directlyReboot: Restart phone safelyRead IMEI: Check device IMEI informationAT Commands: Send custom network and IMS commandsVoLTE and IMS AT CommandsBelow are some tested AT commands used for enabling VoLTE and IMS related functions on supported MTK devices. These commands may help after flashing firmware or network repair work.AT+EPCT=0,0AT+ECFGGET="sdm_profile_prefer_sms_over_sgs_to_ims"AT+ESBP=7,"SBP_MP_LTE_DOWNLINK_LAA_r13"AT+EIWLCFGSET="wans_op_id","16386"AT+ECFGSET="operator_code","16386"AT+ECFGSET="voice_support","1"AT+ECFGSET="video_over_ps_support","1"AT+ECFGSET="sms_support","1"AT+ECFGSET="ims_signaling_qci","5"AT+ECFGSET="UA_call_precondition","0"AT+ECFGSET="mtk_ct_volte_support","1"AT+ERAT=6AT+PSBEARER=1AT+ESSP=1AT+CGDCONT=1,"IP","ims"AT+ESIMS=1AT+EIMSPDN="onoff",1AT+EIMSESS=1AT+EIAREG=1AT+CIREG=2AT+EVOCD=1AT+ESSP=1How to Use Extra-Tools SPD Diag ToolDownload the tool from the download section below.Extract the ZIP file using WinRAR or 7-Zip.Open the extracted folder.Run Extra-Tools SPD Diag Tool v1.0.exe as Administrator.Turn OFF the phone and connect it using USB cable.Wait until SPD Diag Port is detected.Now select the function you want to use.For example:Click Factory Reset to wipe data.Click Read to check IMEI.Click Reboot to restart phone.Paste AT commands and press Send.After work is complete, disconnect the phone safely.File InformationTool Name: Extra-Tools SPD Diag ToolVersion: v1.0File Type: Portable ToolCompatibility: Windows 7, 8, 10, 11Supported Devices: SPD and Some MTK PhonesLicense: FreePassword: no passwordDownload Extra-Tools SPD Diag Tool v1.0Download Extra-Tools SPD Diag Tool - FreeAdvantages of This ToolVery small and lightweight softwareNo activation neededEasy for beginnersOffline working supportFast execution of commandsUseful for mobile repair shopsSimple interface without confusionFAQs1. Is Extra-Tools SPD Diag Tool free?Yes, this tool is completely free to use and works offline.2. Can I use this tool for VoLTE fixing?Yes, you can send AT commands for IMS and VoLTE related settings on supported devices.3. Does this tool need installation?No, it is a portable tool. Just extract and run the EXE file.4. Which phones are supported?Mainly Spreadtrum devices are supported, but some MTK functions also work.5. Is this tool safe for normal users?Yes, but always use carefully. Wrong commands can create network or software problems.