I hope you all are doing well
Im trying to solve my problem about send Bulk SMS text message to customers in United States, I live out of United States, I have been checking a lot web sites for sending SMS campaigns, most of them are very expensive.
I have VOIP GSM Gateways with SMPP protocol with four SIM cards ports, according what I know:
I need to live in USA to connect my GSM modem with SIM card it belong to any USA Cell Phone Carriers like AT&T, Sprint, T-Mobile, Verizon, etc, etc.
That will never happen, because I dont live there, I would to know if there any other alternative to use it.
I will appreciate any suggestion or forum reference, I need to know if I can still use the GSM modem or should I dismiss all ideas about it.
Thanks in advance for your help.