Through its Mobile for Reproductive Health (m4RH) project, FHI 360 developed a set of text messages on family planning methods that users in Kenya and Tanzania can access via their mobile phones. This low-cost approach to reaching contraceptive users was part of a research study aimed at determining the feasibility of providing family planning information via text message. The m4RH messages were developed using evidence-based content, including the World Health Organization family planning handbook for providers, and were crafted specifically for short message service (SMS), or text message, use. Each message was designed and tested to ensure user comprehension within the 160-character limit. The m4RH service provides information on long- and short-acting family planning methods, including implants, intrauterine devices, permanent methods, injectables, oral contraceptive pills, emergency contraception, condoms and natural methods such as the lactational amenorrhea method. The messages address side effects, method effectiveness, duration of use and ability to return to fertility. The service also lists local clinics in a database that is searchable by province in Kenya or by ward in Tanzania.