Q: iPhone not able to activate

Hi Community , i am having a iPhone 6 and recently i just updated my iOS version to 9.3.5 . After the update is completed, i was not able to activate my phone ...

it  written that the "activation server cannot be reach , please try again" and written that "connect to iTunes to activate the iPhone or try again" .

My only concern is ,if i connect through iTunes and activate from there, will it affect/erase the content in my iPhone ?

Please advise and help.

Thank you in advance .