In the past the only mobile browser that allows typing in phone # to log into boostmobile account is FireFox. What a pain, because FF mobile is a huge resource hog like its computer versions.
Now there is an easy way, just click the following link on your phone or tablet, regardless what browser you use:
Once logged in, there is a link to go to the full site. The phone # you just entered is already there, no need to enter it again which is impossible to do with a mobile browser except FF.