How do I delete browser history when the delete button is greyed out on settings

How To Fix The Issue "Can't Delete Safari History On iPhone 6"?
Some users have reported repeated experience in encountering issues with their Safari browsers. Users have further tried to erase their searched Safari history but, it appears to be grayed out. Deleting via Settings process too does not seems to be working out on the iPhone. Well, this issues can be the cause of user's "Restriction settings" on the iPhone 6 as said by Safari Browser Technical Support Toll-Free 1-800-213-8289 professional team. But fortunately we have got a solution to this issue which is considered as the best option for users. One needs to switch off the "Restriction" settings by simply following all the below given steps

Steps to fix the "can't delete Safari history on iPhone 6"


Step 1: Settings option
·Open and click on the "Settings" option
Step2: "General" settings
·Tap on the "General" settings
Step 3: Restriction option
·Scroll down and then select the "Restrictions" option
Step 4: Restrictions code
·Enter the restrictions code when you are prompted for it as suggested by Safari Browser Tech Support team members.
Step 5: Disable Restrictions
·Next, a user is required to choose the "Disable Restrictions" icon to proceed futher
·While disabling the restrictions, users are requested to completely erase their history on their iPhone.
·If they are only clearing out History and leaving all the cookies as well as data, one can still view all the web history by simply directing themselves to Settings > Safari >Advanced (at the bottom) > Website Data option.
·In response to clear the history, users are suggested to get used to both the options i.e Clear History and Clear Data and Cookies.

Come and explore our world-class Safari browser support services by getting in touch at Safari Browser Customer Support section now! For more queries, do give us a call. We promise to deliver our customer the best industry results available in the marketplace as and when needed by them. You can even drop us an email to get all your Safari browser issues solved promptly.

Go to setting > Safari and clear history.

Have you noted that the Safari application must be completely shut down prior to clearing any history, cache, cookies, etc.
If you are unsure how to do this, visit (Apple Site) : How to kill iPad/iPhone appstutorial.
( If that don't work. Please post a new question. And we'll try something else!).
C. (DK).

First
go to setting - general - reset - reset network setting.
then
in setting click on safari and then click on clear history and click on clear cookies and data.

Go to the Settings icon on main screen, Safari, clear history or cookies