OnVerify.com announces the unique features at SMS Verification:
1. Robust infrastructure. System not only fail overs, undeliverable sms are re-routed to alternative providers. Re-routes, re-sends are not billed extra. You are charged per transaction.
2. Automatic number format checking. No worries in case your customers provide a wrong number, we don’t bill it. Instead return error,
3. Worldwide numbering plan checking. Together with number format checking, we also check if country code + prefix is defined. In real time, without an extra cost.
4. We do not bill or try to deliver to a mobile number if the number is not “live”. Ask this especially from your current sms verification provider.
Give it a try at onverify.com. There is online sms verification demo at demo page. Account opening is free. Don’t pay till you test and see it working.