Phone verification SMS to the Philippines never arrived (+63 9......)

**Describe the bug**
Verification SMS doesn't arrive

**To Reproduce**
Steps to reproduce the behavior:
1. Go to Setting
2. Click on Add phone number
3. Type number
4. Click continue
5. See blue box to enter the code
6. Nothing happens, no SMS arrives

The chain seems to be:

Keybase app -> Keybase server -> SMS provider -> Philippines Telco (e.g. Globe) -> local network -> mobile phone.

Wonder where it broke?

my log id: 2c4555052c80660e52c59a1c

**Expected behavior**
SMS arriving

**Screenshots**

**Additional numbers**
The number 345567

Begin with the Settings > Add phone number reproduction steps and use log ID 2c4555052c80660e52c59a1c to trace the verification request across the Keybase app, server, SMS provider, and Philippines telco. Done means identifying where delivery fails or confirming the relevant provider or network limitation.

Written by the indexing model from the issue text.