Samasung Galaxy J7 Wi-Fi problem - Android Q&A, Help & Troubleshooting

I am facing strange case with my J7 mobile it wont connect to my wi-fi all phone at my home are connected except my phone
i am seeing a list of available wi-fi network i set the user name and password it write connecting for one second and then nothing happen
I tried to
1- check router password
2- change the wifi network name and password
3- restart the router
4- make hard rest to router
5- make hard rest for the phone it self "twice" :S
6- search on net and they said to switch off the power saving mode by dailing *#0011# then press more choose wifi
then power off power saving but I dont have such option !! link of that article
but nothing help me to get out of that.... android version 6.0.1

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Hi,
I am facing issue with my oneplus one with data connection, its getting lost suddenly & when I do a reboot its start working again for some hours then again its lost.
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Hey ! I have a network issue after installing stock rom in my device.
My device is " XOLO ERA 4G " before there was " Android lollipop 5.1 " in my device . Recently i flashed " Android Marshmallow 6.1 " Rom of this same device using " SPD Flash tool ". It successfully flashed but there is network problem. Sometimes there is full network range but it is not stable . When i turn on my internet connection then it shows the full network but internet still dose not works.
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Thanks For Help and reply Sir
Sorry for my grammar
Yes, when I dial *#06# a popup dialogue box appears which shows 2 IMEI numbers.
And My Bluetooth is working well.
Okay , try to reset your wifi roother then Wipe Cache Partition from recovery , after that reboot your phone, once is On disable Wifi nd bluetooth , now make sure that Time and date is correct then power off your device. Wait few minutes and power up your device , now turn off wifi , remove any saved networks and connect to your wifi network .

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