Before you buy a new smartphone,You need to know how to reset Samsung Galaxy S5 .Here some Futures of samsung galaxy s5: Li-Ion2800 mAh battery, 2G,3G,4G, GSM ,HSPA,LTE network supported , Micro-sim supported,Quad-core 2.5 GHz Krait-400 processor, Super AMOLED capacitive touchscreen, 16M colors and multitouch supported, RAM 2GB, internal memory 16/32GB, Expandable memory up to 128GB(micro SD card slot ), 5.1” display, Back camera 16MP, Front camera 2MP, camera pixels 5312×2988 (phase detection Autofocus, LED flash), weight 145gm, Bluetooth v4.0,A2DP,EDR,LE,apt-X, Wi-Fi 802.11,a/b/g/n/ac, dual band, Wi-Fi Direct, hotspot, Android OS, V4.4.2(KitKat), upgradeable to v5.0(LoliPop), Accelerometer,gyro, compass, barometer, gesture, heart rate, Proximity sensors,Radio No, HTML5 Browser, Micro USB V3.0(MHL 2.1 TV-out), USB Host.
If you forgotten your phone pattern lock, google lock or phone code. I show you factory reset samsung galaxy s5
Method One:
Step 1: First turn off your samsung galaxy s5 Smartphone.
Step 2: Release any SIM CARD AND SD CARD on your SmartPhone.
Step 3: Press and Hold VOL+ KEY, HOME KEY and POWER KEY 10 seconds.when you see in your mobile screen SAMSUNG logo release all hold key.

Step 5: After sometime you got RECOVERY MODE, Use VOL- KEY select WIPE DATA/FACTORY RESET and press POWER KEY to confirm.

Step 5: Use VOL- KEY to select YES — DELET ALL USER DATA and press POWER KEY to Confirm. (Notice: when you select Yes — delete all user data and press POWER key you lost your phone all user data)

Step 6: Wait until complete RESET YOUR PHONE, select REBOOT SYSTEM NOW and press POWER KEY.
Step 7: Now your Smartphone will reboot.
Step 8: Now reset samsung galaxy s5 is Successful!!
Method Two:
Step 1: Turn On your samsung galaxy s5.
Step 2: Press Menu button and Go to Settings >> Backup and reset >> Factory data reset >> Reset Phone >> Erase everything .Now your Phone will restart.