Motorola Moto W755 Instruction Manual - The price for One Talk is typically $25/month per user. If you only add the One Talk dialer to your certified device with no shared endpoints on the same mobile line, the price is $15/month. If you're using a One Talk desk phone and the One Talk Mobile App, the price is $25/month.. Monthly charge: The monthly charge for Total Mobile Protection (TMP) is $13.00/$10.00, depending on device. TMP and TMP Multi-Device (TMP MD) and TMP Multi-Device for Business (TMP MD for Bus) ($39.00) are a combination of products, each of which is available separately: Wireless Phone Protection.