In today's mobile age, you need to always have your contact database, calendar, and email at hand. As you meet people, you can impress them if you can find someone quickly in your network to introduce them. So, having your contact database handy allows you to search and find the appropriate person. At the same time, you may want to schedule a follow-up meeting to your conversation. So, having your calendar handy is great for scheduling appointments on the spot.
While email access is nice to have with you on the go, don't get in the habit of checking it during meetings, events, or conversations. You need to be focused and don't want to come across rude. Use email wisely and not during relationship building time.
For the past few years, I have been using the Samsung i500, which has been an awesome phone for my calendar and contact database. It is a very small PDA phone that fits easily in the pocket. However, email and Internet usage is not great on the phone.
Since I use Sprint service, I have been waiting awhile for the Motorola Q smart phone. Sprint just started carrying this phone since Verizon had a 6 month exclusive distribution with Motorola. Well, I ordered the phone and just got it in the mail. I haven't even set it up yet but am very excited because it is so small and has much more than my last phone. I know that there have been some issues with the phone. Basically, you can't please everyone all of the time so I will adjust to whatever issues that I come across.
So, having a smart phone can help you become a more effective networker when you are on the go. With prices coming down on phones and plans, it is worth the extra investment to enhance your relationship building.