Found an easy solution to sending SMS for free via Blynk. My cellphone provider, as do most has a free gateway where you can send a your TXT to a email address and it gets converted to a SMS and sent to your phone. So I just use it as part of the email widget insteasd of my email address, I use Verizon and their format is " Your cell number" @vtext.com. Works like a charm. For ATT phones its firstname.lastname@example.org, but I have dont have ATT and cant test it.
Below is a list for other carriers:
US Cellular @email.uscc.ne