Default Unlocked Unrooted Bell N900W8 on fido keeps losing data :(

I have an unrooted Bell Note 3. I unlocked it using an unlock code that I paid for and it is currently on the Fido netowrk. I keep losing data on the phone. The phone is set to search networks automatically and the network mode is set to GSM/HSPA/LTE(auto connect).

I'll be driving along and all of sudden it'll come up saying no data connection but I'll have full signal. No 3G/4G notification at all.

Has anyone had this issue?

I'd rather not root the phone and install a different rom until it's out of warranty.

thx