# Common Problem
## **Most Convenient APP**
| Name | Andriod | IOS | PC |
|---|
| Metamask | Medium | Medium | Best |
| TrustWallet | Best | no | no |
## Common Problem
To use **Binance Smart Chain (BSC) DApps**, you will need some **Binance Coin (BNB)** to pay your transaction fees.
#### Every time using BSC or interact with smart contracts, you’ll have to pay some gas.
{% hint style="danger" %}
If you use Binance APP,you need to withdraw to **Metamask** or **TrustWallet** of BSC address.
1.If you are withdraw **USDT**, you will also need a small amount of BNB to be the GAS fee. If you do not have BNB, you will not be able to trade.
*Every package more or less cost 0.0026 BNB.*
{% endhint %}
{% hint style="danger" %}
If you use Binance APP,you need to withdraw to **Metamask** or **TrustWallet** of BSC address.
2\. If you are withdraw **BNB**, you also need a small amount of BNB to be the GAS fee. (Using BNB to make a transaction then GAS fee will be a little bit cheaper.)
*Every package more or less cost 0.0019 BNB.*
{% endhint %}
---
# Agent Instructions: Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://nftsbattle.gitbook.io/nfts-battle-or-en/help/wallet-issues/common-problem.md?ask=
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.