The following are 6 very important factors to consider when you are selecting a VoIP provider. Educate yourself and be informed before you choose.Monthly costs: A VoIP provider can save you up to 80% on your telephone/long distance expenses. There are many VoIP providers out there so it will benefit you from shopping around. Unlimited calling packages can range from $16.58/month to as high as $54.95/month. Usually the lower priced providers have more customers and are able to offer the service a.