FYI, the official telegram wallet can be accessed here
https://pay.wallet.tg/ there many phishing and fake sites out there.
I can say the wallet created by telegram is bad because there are three things that doesn't looks good. First they're asking to submit KYC, they charge flat fees around 1-3%, this is big if you're send a big amount of coins and you need to wait for 48 hours to receive your coins, it's not instant.
Information about fees, balance and withdrawal
What fee should a merchant pay?
The fee is individual for each merchant, it depends on a number of parameters and is set after passing the successful verification of the application. Usually it is around 1-3%.
Fee is deducted from every successful payment amount. For example: a merchant’s fee is 2%. The product that a buyer pays for costs 20 TON. After a successful payment, the merchant will receive 19.6 TON.
Standard fees will apply when withdrawing from Wallet to another service.
2. Take a short survey
If you are logging in for the first time, or some additional information is required, Wallet Pay offers you to answer several questions for more details. There are two steps:
Questionnaire
KYB (Know-Your-Business) or KYC (Know-Your-Customer) checks
Once completed, your application will be reviewed shortly, and you will be notified about the results. If successful, you will see the fee charged by the service, and get access to your account where you can start the integration.
6. Withdraw the funds
After the customer confirms the payment, the funds are credited to your Assets and held for 48 hours by default. After this time expires, you can withdraw the funds to the balance of your Wallet account you used to log in to Wallet Pay service