Currently, Smart Bro is the only remaining option for you to get a LTE-capable USB dongle with the Smart Bro LTE Plug It which they introduced last year. Good news as you don't have to pay by its intro price of Php 3,888
I checked out the Smart store website at store.smart.com.ph and look, the device is now at only Php 2,495.
That's over P1,300 of savings and it will be better if you have an available Smart LTE signal near your home or your usual places to maximize it's capabilities. I saw it first via a tweet which as early as May 28, 2015 but no info yet if this is only a promo or a new and lower SRP.