The sleek and stylis Samsung a157’s compact design is perfect for those who primarily want a device for voice calling, but also want the ability for SMS text messaging. It also gives you access to AT&T’s 3G network so you’re connected with speed and style. It’s the technology you want – without the big monthly commitment.
Other features include mobile web browsing, SMS text messaging, and speakerphone for easy hands free talking. It also comes with AT&T mobile care that allows you to get up-to-date account information, add funds, and manage your account right from your phone. You can also download ringtones and wallpapers.
With AT&T's GoPhone pay-as-you-go service, you get all the benefits of wireless without the surprises--no long-term contracts, credit checks, or deposits. You can easily refill your minutes via prepaid cards or the Internet, or choose to prepay each month and roll over unused minutes.
You can choose from a variety of plans that suit your individual needs--including monthly and daily plans with unlimited talk and text messaging as well as a simple per-minute plan. And with Rollover Balance, you can carry over your unused account balance when you refill before your balance expires, up to the account maximum (learn more below).
The Samsung a157 weighs 2.82 ounces and measures 3.76 x 1.83 x 0.65 inches. Its 800mAh li-ion battery is rated at up to 5 hours of talk time, and up to 10 days and 6 hours of standby time. It runs on AT&T's dual-band 3G network (850/1900 MHz; HSDPA/UMTS). It has an internal memory of 256 MB.
What's in the Box
Samsung a157 handset, rechargeable battery, wall charger, user manual, phone and feature guide, SIM card, PAYG quick start guide, and PAYG user guide.
AT&T's pay-as-you-go GoPhone plans are wireless plans made easy, simply pay in advance for what you need. No long-term contracts, credit checks, or surprise bills--just all the benefits of wireless, with no complications. In addition, AT&T's Rollover Balance feature lets you carry over your unused account balance when you purchase refill minutes before your balance expires.
Other great GoPhone features include no long distance or roaming fees across AT&T's national service area, the ability to track usage via text messages with an updated balance after each call, and the ability to refill your minutes 24-hours a day, 7-days a week. You can also choose to add international long distance for calling to over 50 countries (including Mexico landlines and Canada) for just $10 for 250 minutes. And you can cancel any time without penalty.
Smartphone users can use any of these GoPhone plans, however, a smartphone require a data/web package to use data/web services. Pay-per-use data/web is not available on smartphone devices. Data packages for all GoPhone plan options (for mobile web access for e-mail, Facebook, Twitter, and more) include the following:
Data packages are good for 30 days, as long as your account balance is not expired. Standard rates apply if feature package is not renewed after 30 days.
Learn more about AT&T GoPhone plans from this handy chart, plus check out AT&T's nationwide coverage map.

For your convenience 24/7, you can add money to your account in a variety of ways and in a variety of amounts.
To check on your current balance, dial*777# and press SEND to receive a text massage indicating your account balance and expiration date.
AT&T GoPhone refill cards are available in these amounts: