Mobile Terms and Conditions

Effective Date: 10/18/2023


Opt in to receive messages regarding our currently enrolling studies and other helpful research-related information from Helios Clinical Research. Opt in by texting STUDIES to 34246, completing one of our written patient forms, opting in verbally with a staff member, or checking the opt-in box on one of our online forms. Message frequency varies. Message & Data Rates May Apply

By opting in, you authorize Helios Clinical Research to deliver marketing messages using an automatic telephone dialing system. You are not required to opt in as a condition of purchasing any property, goods, or services.

By signing up, you are confirming you are over the age of 18.

STOP Information

Text STOP to 34246 to stop receiving Helios Clinical Alert messages from Helios Clinical Research (you will receive a confirmation text).

HELP Information

For additional information, text HELP to 34246 or contact

Supported carriers are: 

AT&T, Sprint, T-Mobile®, Verizon Wireless, Boost, Cricket, MetroPCS, U.S. Cellular, Virgin Mobile, Google Voice, ACS Wireless, Advantage Cellular (DTC Wireless), Appalachian Wireless, Atlantic Tele-Network International (ATN), Bandwidth, Bluegrass Cellular, Buffalo Wireless, CableVision, Carolina West Wireless, Cellcom, Copper Valley, C-Spire Wireless (formerly Cellsouth), Cellular One of East Central Illinois, Chariton Valley Cellular, Cross (dba Sprocket), Duet IP, Element Mobile, EpicTouch, GCI Communications, Golden State, Hawkeye (Chat Mobility), Hawkeye (NW Missouri Cellular), i Wireless (IOWA Wireless), Illinois Valley Cellular, Immix (Keystone Wireless / PC Management), Inland Cellular, Mobi PCS (Coral Wireless LLC), Mosaic, MTA Communications, MTPCS / Cellular One (Cellone Nation), Nex-Tech Wireless, Panhandle Telecommunications, Peoples Wireless, Pine Belt Wireless, Pine Cellular, Pioneer, Plateau, Revol Wireless, RINA, SI Wireless/Mobile Nation, SouthernLinc, SRT Wireless, Thumb Cellular, Union Wireless, United, Viaero Wireless, West Central Wireless, Leaco, Nemont/Sagebrush. T-Mobile is not liable for delayed or undelivered messages.

We take your privacy seriously. Please visit to review our privacy policy.