Grey Routing is a term given to messages that are sent to carriers (often offshore) that have low cost interconnect agreements with other carriers. Instead of sending the messages directly to the intended carrier, some bulk SMS providers send it to an offshore carrier, which will relay the message to the intended carrier. At the cost of consistency and reliability, this roundabout way is cheaper, and these routes can disappear without notice and are slower. Many carriers don’t like this type of routing, and will often block them with filters set up in their SMSCs.
To find out whether a new version of your message performs better, you first need to know how it has performed in the past. Establish a baseline to compare the results of your new message to. Be sure to note any relevant results like amount of recipients, time of day, day of week, time of month (e.g. did you send the message around pay-day or just before, when everyone postpones spending money until their pay check arrives?), open rate, click-through-rate (CTR), amount of conversions (note: specify what a conversion is for you), conversion rate, and anything else of importance.
Remember to incorporate your SMS marketing effort as part of your overall marketing plan. Ring activity on the greater part of your marketing items, print and advanced, welcoming clients to join your SMS hover by messaging a message or code to your telephone number (in return for a rebate, complimentary gift, or another reward). This will widen your client base and also expanding deals.
You will have a greater chance of gaining access to their mobile number by following these guidelines. You can collect their numbers using a sign-up sheet at your register, asking them when talking on the phone, allowing them to submit a form on your website, or by giving them a number that they can text to subscribe to your SMS messages. Whatever you do, keep a copy of their permission to market to them via SMS, if you run into problems you will be glad you did.