[Python] How to ensure receiving an SMS verification code from Telegram using Telethon?

I'm currently working on a Python project where I need to authenticate a user via Telegram's API using the Telethon library. I intend to receive the authentication code via SMS, but I consistently receive a voice call instead. I'm looking for a way to force or ensure that Telegram sends the verification code through SMS.

Here's the relevant part of my code:

from telethon.sync import TelegramClient
from telethon.errors import SessionPasswordNeededError, FloodWaitError

api_id = 'your_api_id' # Replace with your actual API ID
api_hash = 'your_api_hash' # Replace with your actual API hash
phone_number = '+1234567890' # Replace with the phone number you're using

client = TelegramClient('anon', api_id, api_hash)

async def send_code_via_sms():
await client.connect()
if not await client.is_user_authorized():
try:
# Explicitly request the code via SMS
result = await client.send_code_request(phone=phone_number, force_sms=True)
print("Code request sent via SMS. Please check your messages.")
# Proceed with handling the code
code = input("Enter the code: ")
await client.sign_in(phone=phone_number, code=code, phone_code_hash=result.phone_code_hash)
print("Signed in successfully!")
except FloodWaitError as e:
print(f"Need to wait for {e.seconds} seconds before trying again.")
except Exception as e:
print(f"Failed to sign in: {e}")
else:
print("Already authorized!")


Despite setting force_sms=True, the verification code still not coming via a SMS. I've checked the Telegram settings to ensure that the phone number is correct and that SMS notifications are enabled.

Questions:

1. How can I modify my Telethon script to ensure I receive the SMS instead of a voice call?
2. Are there specific conditions under which Telegram decides to send a voice call instead of SMS, and can they be influenced programmatically? Thank you for any insights or suggestions you can provide!

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