I don't think the Maxx has a built in data saver mode. Is something appearing in your notifications window? Also, for the email attachments, are you referring to the email client or gmail?
No, I can't stand GMail. I'm using the stock Android mail app.
It mentions a "data saver mode" in various situations.
For example, if I try to email a large attachment, it tells me it will remain in the outbox until Wi-Fi is available because of "data saver mode."
Another example, whenever someone sends me an email with an attachment, I always have to open the email and then manually download the attachment.
I have unlimited data and am rarely on WiFi so I'm looking to turn off this "data saver mode" so everything will download automatically so when I open an email the attachment will already be there.
Or when I need to email with a large attachment the "data saver mode" won't make it wait in the outbox until I can get get to Wi-Fi.
And anyone willing to help me figure this out, please don't tell me to switch to GMail or use K-9, etc. I really hope to figure this out using the stock client by disabling "data saver mode."
Any hhelp appreciated - thanks!