You can either call the hotline (211 from mobile) or just dial *143# to get details of your bill and many other things.
Hi chingvanz, we don't have a monthly bill notification via your mobile number yet. However, you can be notified via email if you sign up to Paperless Billing at www.globe.com.ph/gogreen.
Also, Chito is right. You can also see your monthly billing statements of up to the last 12 months at www.globe.com.ph/myaccount. Simply register and add your account to your dashboard.