Tap on your wallet name at top left corner of the screen and go "Addresses/Coins". After that, you will see a bitcoin address. Is the address same as your paper wallet address?
If the address is not correct, either you entered a wrong private key or imported a correct private key but with wrong script type. Note that if your address starts with bc1, you should add "p2wpkh:" before the private key.


I edited the post to fix a typo. Thanks Charles-Tim for the correction.

Wrong.
As I said in the first reply, transactions are confirmed by miners.

Transactions must be valid, so that they can be included in the blockchain, but it's not that a transaction is included in the blockchain once it's validated.
For a transaction being confirmed, it's required that a miner (or a mining pool) solves the proof of work problem, mines a block and includes that transaction in the block.

A transaction can be partially signed, if you are using a multi-signature wallet.

If your wallet is m of n multi-signature wallet and m is greater than 1, you have to provide more than 1 signature for each of UTXOs you are trying to spend. So, your transaction is partially signed and it needs to be singed by cosigner(s) as well. To do so, you should export the partially signed transaction and import it to the cosigner wallet.

You are completely wrong.

Please always read previous replies before making a post.
As already stated, the transaction size and the fee doesn't depend on the amount you send. Therefore, it doesn't matter you are spending 1 BTC or 0.1 BTC.
What matters is the number of inputs and outputs.

Every time you make a bitcoin transaction, you broadcast some data.

For example, for each input you add to your transaction, you should have a TXID, an index and an unlocking script in the transaction data. Also, for each output you add to your transaction, you should have a value and a locking script.
The more inputs or outputs you have in your transaction, the larger data you have to broadcast to the network and the larger data the miner has to include in the blockchain.

(The raw transaction should include some other data and what I mentioned above are just some of them.)

The change addresses (those that are highlighted in yellow) are your own addresses.
Any fund that has been sent to your change addresses should be displayed in your wallet and you should be able to spend them easily.

Now the problem is that the fund has been moved from bc1qj2ay5m3l45klwappmqu9zw7ddlqlydr5mqeppw (your change address) to bc1qfk6ky2r2ww7tkn4ymt59t4lq85rerthfemz3xr.
If you didn't make that transaction, your wallet has been compromised.

P2PK (Pay to public key) transactions were common in the early days of bitcoin.
These days, it's not common to pay bitcoin to a pubic key. If someone wants to send you bitcoin, give him/her your address.


Your bitcoin address is derived from your public key.

A public keys starts with 02 or 03, if it's compressed and with 04, if it's uncompressed.
A bitcoin address starts with 1, 3 or bc1.


xpub is the term used for master public key.

OP is probably talking about individual public keys. A public key includes 66 or 130 characters.


Technically speaking, it's possible to pay bitcoin to public key, but as I said, that's not common these days.

I feel you don't know how a multi-signature wallet works.

The standard wallet you create on electrum is a single-signature wallet which means that there's one private key for each of your addresses.

In a m of n multi-signature wallet, there are n private keys for each of your addresses and m of them are required for signing a transaction.
As I already said, Electrum 2FA wallet is a 2 of 3 multi-signature address. This means that for spending from each of your addresses, two private keys are required.

Since your private keys are derived from master private keys, two out of three master private keys are required for spending fund from your wallet.

Let's say the master private keys are MPK1, MPK2 and MPK3

MPK1 is kept is stored in the wallet file.
MPK2 is owned by trustedcoin.
Your seed phrase can generate MPK1 and MPK3.

When 2FA is enabled, you sign your transaction using private key(s) dervied from MPK1 and with entering the 2FA code, you ask trustedcoin to cosign the transaction using the private keys(s) derived from MPK2.
When 2FA is disabled, your wallet file contains MPK1 and MPK3. You have two master private keys in your wallet file and you no longer rely on trustedcoin for making transactions.


Yes.

Electrum 2FA wallet is a 2 of 3 multi-signature wallet and there is no way to turn a multi-signature address to a single-signature address.

As long as 2FA is enabled, your wallet file contains one master private key and if you want to make a transaction, you should ask trustedcoin to cosign your transaction.
If you disable 2FA, your wallet would be still a 2 of 3 multi-signature wallet, but with two master private keys.

As mentioned by Charles-Tim above, if you want your fund to be in a singles-signature wallet, you have to make a new transaction and send the fund to your new wallet.


If you want your transaction to include only 1 output, you should spend the entire balance of selected UTXOs, so that your transaction doesn't have any change.

Select "Standard wallet" and then "I already have a seed". After that, you should enter your seed phrase.

If you are using the android version, you should select BIP39 in the dropdown menu at top of the screen.
If you are using the desktop version, you should click on "Options" and then select "BIP39".

The script type will be asked after entering the seed phrasing.

With importing your seed phrase into electrum, you don't move your fund. You only import your keys, so that you can make a transaction using electrum.


Take note that neither electrum nor trustwallet charge you any fee and. All the fee you pay goes to miners and you can set the fee by yourself.
The fee you should pay for your transaction depends on how congested the network is, how fast you want your transaction to be confirmed, number of inputs and outputs and their types.

The message displayed about bitcoin core has nothing to do with the error you got. That message is  displayed at top of every page and it's just giving you the link to bitcoin core website.
You got that error probably because you left a page open for a long time and your session code changed in that time.

For more information, read the old post made by theymos.

If I understood you correctly, bc1qj2ay5m3l45klwappmqu9zw7ddlqlydr5mqeppw is highlighted in yellow. If that's the case, it means that that's your own address.
Did you cancel any transaction? When you cancel a tranaction, electrum replaces it with a new transaction sending the fund to one of your own addresses.

The fund was sent to bc1qj2ay5m3l45klwappmqu9zw7ddlqlydr5mqeppw and then to bc1qfk6ky2r2ww7tkn4ymt59t4lq85rerthfemz3xr.

Do you know bc1qfk6ky2r2ww7tkn4ymt59t4lq85rerthfemz3xr?

I also tried to import a 2FA seed phrase into the android version of electrum to see how it works and got the following error.
 


I cleated electrum's cache to see if it solves the problem. It didn't and I got the same error again.
After that, I cleared all electrum's data from my device and then imported a 2FA wallet. It worked.

It seems that once you create your first wallet in electrum, it no longer allows you to import a 2FA wallet.

Nodes validate all transactions they receive. If a transaction is valid, the node sends it to other nodes.
Validation means checking if the transaction follows consensus rules. For example, one of consensus rules is that the total value of outputs must not be greater than the total value of inputs.

Nodes also check if the transaction follows their own rules. For example, almost all nodes reject any transaction with the fee rate of less than 1 sat/vbyte.
Note that a transaction with the fee rate of less than 1 sat/vbyte can be valid, but nodes usually reject such transaction.


Transactions are not encrypted.
Miners include transactions in the blockchain exactly as they receive them.


Transactions are not confirmed by nodes. Transactions are confirmed by miners.
Take note that confirmation means being included in the blockchain and that's different from being validated.

A miner (or a mining pool) that manage to find a block, sends the block to the network. Nodes receive the block and validate it.
Validation of a block means checking if the block and the transactions included in that are valid.

I guess you selected "Standard wallet" when creating the new wallet.
As stated above by Charles-Tim, you should select "Wallet with two factor authentication".

In the desktop version of electrum, you can import your 2FA seed phrase even if you select "Standard wallet", but in the android version, you have to select "Wallet with two factor authentication".

The seed phrase you generated using Coinomi is BIP39 and as stated by Charles-Tim, you should select "BIP39" option when importing your seed phrase.

In the next step, electrum will ask you to choose the script type.
Since your addresses start with bc1, you should choose "native segwit (p2wpkh)"

Compressed and uncompressed formats of your private key would generate different addresses.
Most probably, you don't need to derive the uncompressed format of your private key. It's not common to use uncompressed private keys and the address you are looking for is probably derived from the compressed private key.


If you import your private key into electrum, you will see the derived address and you can check if that's correct.
If the address is correct, it means that you have the correct private key.

Once you create a wallet with BIP39 seed phrase, electrum calculates the master private key and master public key and saves them in the wallet file.
With having master keys, electrum can generate private keys and addresses without any need to the seed phrase.

As mentioned by Zaguru12, you are probably using an old version of electrum. Since version 4.5.0, electrum allows you to see your private keys on android.


Whether you use the android version or the desktop version, Electrum doesn't show the seed phrase if it's BIP39.
The seed phrase is saved in the wallet file, only if it has been generated by electrum itself.

Your actvity is equal to minimum of your post count and 14 * number of two week actvity periods in which you have made at least 1 post.
You have been active in 17 periods and that's why your actvity can't be more than 14*17. Your activity will increase, once you make your first post in the next period.

The next activity period will start on February 2 at 12:46:40 (UTC).
See this post for exact starting time of actvity periods: TIL Activity does not work on precisely 2 week intervals + interval timings