With an iPhone client you could be in a mountain lodge in Alaska, miles from any cell phone signal and you would still be able to make and receive calls on your iPhone via the lodge's wireless internet network. An iPhone client means you can go to extremely isolated places and as long as you can find a wireless internet connection you can still keep in touch via voice calls to the people you have to talk to. That business deal may have arisen while you were holiday and it may need to be closed while you are still on holiday. Sometimes these things can't wait and you can't get home in time to sort it out.
This is where an iPhone client is so useful. You can continue to take and make phone calls from your iPhone even without a signal, and most importantly you don't have to worry about how much all this is going to cost you. When you make a call from abroad with a cell phone, the charges can be huge. When you make that same call with an iPhone client, the charges will be tiny and you really afford to make as many calls as you like. The iPhone client makes international mobile communications far cheaper and therefore a lot less stressful.
Having an iPhone client really could make a huge difference to your business, especially if you are often on the road, or abroad. It is hard enough to cope with the huge cell phone bills that can be incurred in the course of normal business calls, but if you are abroad when one of these situations arises, you may not have any choice but to use your cell phone. If you have an iPhone client, you don't have to worry. You know that the charges will be tiny compared to the charges you would have to pay if you were using your iPhone as a cell phone, so get an iPhone client and take the stress out of your communications, especially national and international calls. Apart from anything else, the savings you will make could have a really positive effect on your business.