mobibro.com lists the email address support@ihelpmobile.com and the phone number 888-890-6150. Googling either of those reveals many other spammy SMS services, one of which is clubmorty.com. Their contact page says they are owned and operated by Bullroarer: http://www.clubmorty.com/vm/pge_contactus.vm
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I just got hit with this one too — they called themselves SayNow/mxtelecom.com on the bill, but MobibroIQ in the message itself.
The real culprit appears to be Bullroarer, Inc: http://www.bullroarer.com
mobibro.com lists the email address support@ihelpmobile.com and the phone number 888-890-6150. Googling either of those reveals many other spammy SMS services, one of which is clubmorty.com. Their contact page says they are owned and operated by Bullroarer: http://www.clubmorty.com/vm/pge_contactus.vm