What you need to know:
Battery Life / Power – It is very important that the phone lasts as long as you need it. It can be disturbing if in the middle of the day your phone is out of power. All the precious features you depend on are useless, not to mention the inability to make or receive phone calls. Look closely at how many hours of talk and stand by the phone can do without recharging the battery. Large screens when turned on drain the battery the most. This is a very common problem among touch screen phones with large screens. Recharging the phone more than once a day may also be required if you often use wireless connection for downloads, browsing or navigating. Besides the screen, these features drain batteries quickly.
Unlocked GSM phone, World Edition CDMA – Planning to go overseas? Consider having an unlocked phone without sim lock that allows you to use a handset with any local or international carrier that uses s SIM card. Also think about getting a world phone which sports tri-band or quad band modes so you don’t have to worry about staying connected when you travel abroad.
All GSM phones such as AT&T or T-Mobile can be unlocked and used with any international provider. On the other hand, Verizon, Sprint or Metro PCS don’t offer phones with sim cards because of differences in CDMA technology. However, all of these providers offer world edition phones with an extra slot for sim cards under the battery which can be used with international providers while traveling abroad.
Smartphones / PDA Phones – Are you a professional? If yes, you probably need to stay connected to stay competitive in business. You should think about phones with specific software that allows you to have office tools on-the-go. Consider having a phone which allows you to sync data between a handset and your computer, and email client connected to your mailbox. Additionally, think about high speed data for quick downloads, expandable memory card slot for large files, applications for reading office documents and full QWERTY keyboard for fast typing. For smartphones with full PDA capability you should look for phones with specific operating systems such as: Blackberry, Windows Mobile, Android, iOS in iPhones, Palm, or Symbian in Nokia phones.