@Samira Please provide a full screenshot of 850RE, then we can help you with this. There are important information in that page, I think.

Also, please share your router information too, such as the model No. A picture of the label will be much better. Then someone with the same issue can follow this post.

@Selin  thank you for your reply. I am attaching screenshots with the issue 

@Selin  can you see Next to the "HOPE" name (i cose this name for the extended network) it keep saying "internet may not be available" ? 

@Selin here are all the information about name and model of the extender 

@Samira OK, According to the picture 850RE is connecting to your router and the internet status is fine.

Please check the IP on your phone, a screenshot will be better. Maybe it failed to obtian IP address via 850RE.

@Selin  on the phone it only says "intenert may not may available" (next to the extended network name) and sometime i can't even see the extended network. In the case it fails to obtain the IP address how can i fix it please? Thank you very much

@Samira  my to link not good working 

@Samira 

i am also facingthe same issue. Could you plese guide me.Many thanks in advance.