Though this new Gmail feature is currently to Gmail subscriber using gmail.com
With this new feature, Gmail let subscriber use email on any cell phone even basic phone that only support voice and SMS. With this feature you’ll receive , reply and at the same time send email as SMS message regardless of whether your phone is 3G or WI-FI access phone
Now to use Gmail on your phone strictly follow the steps below
Step1. Go to Gmail
Step2. Click your profile photo at the top of any Gmail page and click ACCOUNT
Step3. Click ‘OPEN SMS SETTINGS in the phone and SMS section.....[url][/url]http://cybereasyblog..com/2013/02/gmail-on-your-phone-using-sms.html

i was initially doing this but they kept deducting my credit. i downloaded a Blackberry app caled Logic mail at .com and have since then been sending and receiving my gmail mails using my phone's internet connection and it delivers directly like a pin / sms. also saved me the problem of the default email service not working