Affiliate Marketing Secrets

I bought a Huawei Blaze last week but I have been having a few issues that I cannot get answers for from the handbook, from the company I bought it from nor Huawei website as it won’t let me register for some reason!
So, my queries are, how do I access the internet when I am out and about? I am fine when in a Wifi zone but when travelling in the car for example I am unable to access the internet. I pay for 500mb of data per month so its not to do with my tariff, there must just be a simple setting that I’m missing?
Also, when I got the phone it came with a different number assigned to it but I got my current number to replace the one on the sim card, however, my proper number is showing when i call people etc but say i look at a text i sent and click on my picture then the number shows as the number that came with the phone so how can i change my personal profile on the phone?
Thanks