Look More Than Sip Trunk Pricing

Do you know the factors you should look into SIP service in addition to sip trunk pricing? You want to save money by switching to SIP but you don’t know what to look into the service. You are attracted by promise of low pricing and you expect full support of the service providers.  

https://xinixworldblog.wordpress.com/2016/08/01/look-more-than-sip-trunk-pricing/