Ever since I took the upgrade to Marshmallow, my Galaxy Note 5 won't download anything on WiFi. Not at home, not at work, not at a friend's.
I had same problem. Hope you were able to resolve by now? When I disabled bluetooth, wifi acted normal and speed was fine. Which is annoying because I sometimes have a need to have WIFI & BT on at same time. Waiting for update on this post-Mashmellow update. (Verizon, Samsung Note 5)
I ended up doing a factory reset and have not reloaded all the apps I once had. So far no issues.
For others, try a "Network reset" first. This will erase and reset your wifi, bluetooth and data connections (4G/LTE). And you won't lose your data, just those connections.
Any other suggestions? After doing a Network reset and a reboot, my wifi issues continue. I have bluetooth disabled and wifi still drops all the time. I have the 6.0.1 update which was supposed to fix everything. I really hate to do a factory reset but I may have to. I need to figure out how to backup my apps and Google Authenticator so I can login to my various accounts.
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