<blockquote>
<p>An mBTC, or MilliBitcoin, is equivalent to 0.001BTC&quot; is this a fixed &quot;forever&quot; exchange rate (BTC)1:1000(mBTC)?</p>
</blockquote>
<p>This is not an exchange rate, it is just a unit prefix. There are 1000 millibitcoin in a bitcoin, in the same way there are 1000 millimetres in a meter. Some wallets will allow the user to change the unit that their balance is displayed in (eg BTC, mBTC, sats, etc). Functionally, there is no difference between BTC and mBTC, it is just a display preference.</p>
<blockquote>
<p>and it complains &quot;not enough funds&quot; for transfer.</p>
</blockquote>
<p>The bitcoin network has been <strong>extremely</strong> busy for the last few days, so transaction fees are currently very high compared to the what we've seen for the last year. Your wallet may be attempting to construct a transaction which includes a very high fee (more than the wallet contains - which seems kinda crazy, but I've seen some <strong>very</strong> poorly designed fee management algorithms in some wallets before), but without additional information, its not really possible to fully diagnose the issue. It is probably worth contacting the developer of the wallet if the problem persists. You can also search for 'mempool visualizer' online to watch how busy the network is, and then make transactions during less busy times.</p>
<p>Keep in mind as well, some scam wallets will ask you to deposit coins in order to 'unlock a deposit', 'pay a transaction fee', or some other similar nonsense. I am not saying that the wallet you are using is indeed a scam, but I have not heard of it before, so I mention this just to make you aware of the possibility. The prudent bitcoin user stays alert for such scams.</p>
<blockquote>
<p>Schildbach Wallet (...) this app was shown to me by a friend.</p>
</blockquote>
<p>I̶ ̶h̶a̶v̶e̶ ̶n̶e̶v̶e̶r̶ ̶h̶e̶a̶r̶d̶ ̶o̶f̶ ̶t̶h̶e̶ ̶w̶a̶l̶l̶e̶t̶ ̶s̶o̶f̶t̶w̶a̶r̶e̶ ̶y̶o̶u̶ ̶a̶r̶e̶ ̶u̶s̶i̶n̶g̶ (EDIT: this wallet is indeed listed on bitcoin.org, as RedGrittyBrick pointed out in a comment below). To help ensure you are using software which is not malicious, I would suggest starting from this page: <a href="https://bitcoin.org/en/choose-your-wallet" rel="nofollow noreferrer">https://bitcoin.org/en/choose-your-wallet</a>. There are a lot of malicious wallets out there that will steal/scam you.</p>
<blockquote>
<p>how in the world, should this be usable to buy a cappuccino worth 3.10€?</p>
</blockquote>
<p>When the network is busy and fees are high, it really isn't. During low fee times it is more reasonable, though it is worth mentioning that a ledger which computes and stores every person's coffee transaction information for all time (on tens of thousands of nodes) is a grossly inefficient way to expect a monetary network to work.</p>
<p>If I had to make a small value purchase using BTC, I would instead use the lightning network, which is quite well suited to the job. Doing so will generally require setting up a lightning node/wallet <em>before</em> transaction fees skyrocket though.</p>

CC BY-SA 4.0
2020-10-31T11:56:25.620Z
FYI: https://bitcoin.org/en/choose-your-wallet -> android -> new --> (none) -> (none) -> "Bitcoin Wallet" = [Schildbach wallet](https://bitcoin.org/en/wallets/mobile/android/bitcoinwallet/)
RedGrittyBrick
CC BY-SA 4.0
2020-11-01T02:08:22.967Z
@RedGrittyBrick oh! Thats funny, I didn't realize it was listed there. My mistake, thanks for pointing that out
chytrik
CC BY-SA 4.0
2020-11-17T06:37:56.850Z
thank you for your detailed answer, really appreciate it. yes have heard that Bitcoin is nowadays used as "store of value", not for "cappuccino" (small) transactions anymore, which is kind of sad and also greatly reduces its usefulness (imho) because received my first bitcoins in a cafe as a gift via this above wallet. what is nice to see it's value skyrocket as well X-D the mBTC 5.18/1000 = 0.00518 BTC are now worth 72€! WTF? X-D have a good time, here is a nice chart on the transaction fees (did not know they fluctuate so much) https://privacypros.io/tools/bitcoin-fee-estimator/
user13226980
CC BY-SA 4.0
2020-11-17T06:55:54.930Z
https://f-droid.org/en/packages/com.greenaddress.greenbits_android_wallet/ (is not listed here) https://bitcoin.org/en/choose-your-wallet?step=5&platform=android (UNTESTED!) let's the wallet-user decide the priority of the transaction, and can do the transaction when cheapest https://privacypros.io/tools/bitcoin-fee-estimator/
user13226980
CC BY-SA 4.0
2020-10-30T18:55:07.877Z
2020-11-01T02:09:59.973Z
2020-11-01T02:09:59.973Z
chytrik
<p>this app was shown to me by a friend.</p>
<p>now wanted to test it, so send some BTC into the wallet-app some time ago.</p>
<p>that worked. now got 46.94€ worth of mBTC</p>
<p>(&quot;An mBTC, or MilliBitcoin, is equivalent to 0.001BTC&quot;
is this a fixed &quot;forever&quot; exchange rate (BTC)1:1000(mBTC)?</p>
<p><a href="https://support.coins.co.th/hc/en-us/articles/202087736-What-s-the-difference-between-mBTC-and-BTC-" rel="nofollow noreferrer">https://support.coins.co.th/hc/en-us/articles/202087736-What-s-the-difference-between-mBTC-and-BTC-</a></p>
<p>is technology wise mBTC and BTC working the same?)</p>
<p>and it complains &quot;not enough funds&quot; for transfer.</p>
<p>how in the world, should this be usable to buy a cappuccino worth 3.10€?</p>
<p><a href="https://i.sstatic.net/9fe4T.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/9fe4T.jpg" alt="enter image description here" /></a></p>

<wallet><bitcoin-wallet-app>
Schildbach Wallet complains: not enough mBTC for transation
user13226980
# Schildbach Wallet complains: not enough mBTC for transation

(Asked by: username_0 on 2020-10-30)

this app was shown to me by a friend.

now wanted to test it, so send some BTC into the wallet-app some time ago.

that worked. now got 46.94€ worth of mBTC

("An mBTC, or MilliBitcoin, is equivalent to 0.001BTC"
is this a fixed "forever" exchange rate (BTC)1:1000(mBTC)?

<https://support.coins.co.th/hc/en-us/articles/202087736-What-s-the-difference-between-mBTC-and-BTC->

is technology wise mBTC and BTC working the same?)

and it complains "not enough funds" for transfer.

how in the world, should this be usable to buy a cappuccino worth 3.10€?

[![enter image description here](https://i.sstatic.net/9fe4T.jpg)](https://i.sstatic.net/9fe4T.jpg)

**Tags:** wallet, bitcoin-wallet-app


---

## 1 answers

### Answer by username_1 on 2020-10-30. Score: 1 | Accepted answer

> An mBTC, or MilliBitcoin, is equivalent to 0.001BTC" is this a fixed "forever" exchange rate (BTC)1:1000(mBTC)?

This is not an exchange rate, it is just a unit prefix. There are 1000 millibitcoin in a bitcoin, in the same way there are 1000 millimetres in a meter. Some wallets will allow the user to change the unit that their balance is displayed in (eg BTC, mBTC, sats, etc). Functionally, there is no difference between BTC and mBTC, it is just a display preference.

> and it complains "not enough funds" for transfer.

The bitcoin network has been **extremely** busy for the last few days, so transaction fees are currently very high compared to the what we've seen for the last year. Your wallet may be attempting to construct a transaction which includes a very high fee (more than the wallet contains - which seems kinda crazy, but I've seen some **very** poorly designed fee management algorithms in some wallets before), but without additional information, its not really possible to fully diagnose the issue. It is probably worth contacting the developer of the wallet if the problem persists. You can also search for 'mempool visualizer' online to watch how busy the network is, and then make transactions during less busy times.

Keep in mind as well, some scam wallets will ask you to deposit coins in order to 'unlock a deposit', 'pay a transaction fee', or some other similar nonsense. I am not saying that the wallet you are using is indeed a scam, but I have not heard of it before, so I mention this just to make you aware of the possibility. The prudent bitcoin user stays alert for such scams.

> Schildbach Wallet (...) this app was shown to me by a friend.

I̶ ̶h̶a̶v̶e̶ ̶n̶e̶v̶e̶r̶ ̶h̶e̶a̶r̶d̶ ̶o̶f̶ ̶t̶h̶e̶ ̶w̶a̶l̶l̶e̶t̶ ̶s̶o̶f̶t̶w̶a̶r̶e̶ ̶y̶o̶u̶ ̶a̶r̶e̶ ̶u̶s̶i̶n̶g̶ (EDIT: this wallet is indeed listed on bitcoin.org, as username_2 pointed out in a comment below). To help ensure you are using software which is not malicious, I would suggest starting from this page: <https://bitcoin.org/en/choose-your-wallet>. There are a lot of malicious wallets out there that will steal/scam you.

> how in the world, should this be usable to buy a cappuccino worth 3.10€?

When the network is busy and fees are high, it really isn't. During low fee times it is more reasonable, though it is worth mentioning that a ledger which computes and stores every person's coffee transaction information for all time (on tens of thousands of nodes) is a grossly inefficient way to expect a monetary network to work.

If I had to make a small value purchase using BTC, I would instead use the lightning network, which is quite well suited to the job. Doing so will generally require setting up a lightning node/wallet *before* transaction fees skyrocket though.

> **Comments:**
> **username_2**: FYI: https://bitcoin.org/en/choose-your-wallet -> android -> new --> (none) -> (none) -> "Bitcoin Wallet" = [Schildbach wallet](https://bitcoin.org/en/wallets/mobile/android/bitcoinwallet/)  
> **username_1**: @username_2 oh! Thats funny, I didn't realize it was listed there. My mistake, thanks for pointing that out  
> **username_0**: thank you for your detailed answer, really appreciate it. yes have heard that Bitcoin is nowadays used as "store of value", not for "cappuccino" (small) transactions anymore, which is kind of sad and also greatly reduces its usefulness (imho) because received my first bitcoins in a cafe as a gift via this above wallet. what is nice to see it's value skyrocket as well X-D the mBTC 5.18/1000 = 0.00518 BTC are now worth 72€! WTF? X-D have a good time, here is a nice chart on the transaction fees (did not know they fluctuate so much) https://privacypros.io/tools/bitcoin-fee-estimator/  
> **username_0**: https://f-droid.org/en/packages/com.greenaddress.greenbits_android_wallet/ (is not listed here) https://bitcoin.org/en/choose-your-wallet?step=5&platform=android (UNTESTED!) let's the wallet-user decide the priority of the transaction, and can do the transaction when cheapest https://privacypros.io/tools/bitcoin-fee-estimator/  

---

