> For the complete documentation index, see [llms.txt](https://nftsbattle.gitbook.io/nfts-battle-or-en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://nftsbattle.gitbook.io/nfts-battle-or-en/help/wallet-issues/common-problem.md).
# 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 %}
