If you receive a missed call from an unknown number showing certain area codes:
Your phone may have been targeted. DO NOT call the number back.
Scammers use an autodialer to call your cellphone, then hang up after one ring. The scam phone number then shows up as a missed call on your phone. If you call the number back, you will be connected to a pay-by-minute phone line—usually an adult entertainment service—that will charge $9 or more per minute directly to your cellphone bill. Since these numbers are based overseas, you may also be charged a steep international call fee.
Always be suspicious of missed calls from numbers you don't know—especially if they don't leave a voicemail. The Better Business Bureau warns that missed calls from the the above mentioned area codes are known to be involved in the scam.
If you think you may have been victimized by the scam, report it immediately to the carrier and keep an eye on future cellphone bills. Document the day, time and number received, along with the day and time the call was returned and any additional or pertinent information.
Please be vigilant.