@Phong Vu on that api 90% number getting error (499 & 429) 200 only only 1 or 2 number how can we solve this?

Your question is not very clear so I can just try to guess here.

First of all, when reading the phone numbers of an extension without specifying any usageType filter, you will get also main company number, company numbers. Extensions can just use those numbers as callerID. Sending SMS from those numbers by that extension will fail, unless that extension is assigned to handle SMS for those company numbers.

Tell me which API gives you the error 429 so I can tell you more what is going on.