The software I use is Electrum, it has both the android and windows version, perfectly meeting my demand and also other version working on other platforms.
And if you want to find other software ,you can go to bitcoin.org to get more wallet info. And also you can use your private keys to signature a transaction and broadcast it using some website's free service,like the two below:
https://localbitcoinschain.com/tx/send
https://coinb.in/#newTransaction
And also I wonder how did you submitted the two transactions for confirmed, is it an operation only for miners or we normal users can also do the same thing? And also would you mind sharing what software did you use to rebroadcast the transactions? Because once the transaction was broadcast, I can't rebroadcast it later.
Thanks again for your help.
No problem! Happy you got that sorted.
Now this is strange. But wait. I've always used Electrum so I opened it right after seeing your post to try. My Electrum doesn't let me send 0 fees (I think it hasn't for several versions back). If I set the static fees to zero, it automatically sets it back to a min of 30 sats/byte. If I choose to set fees manually, the minimum on the slider doesn't let me bring it down to zero.
As you can see, I'm not much more a technical expert at this than you =)
The two "accelerators" I use are public, so anyone can use them. Just sign up for an account, choose their acceleration/prioritisation tools from dashboard (unfortunately needs phone registration for the latter):
www.viabtc.com (your tx needs a min 10sats/byte fee though)
antpool.com
In the past, occassionally, I asked some users from here but I no longer rely on them since bitcoinfees.21.co estimates are quite useful. I also wouldn't recommend using these services except in emergencies. We all need to learn to use appropriate fees for normal transactions.
Just leaving your wallets open should be enough to keep your tx broadcast. You also can use blockr.io, blockchain.info
Well, seemed to be an accident to set 0 fees, becasuse I can't set it 0 anymore. Same as you, the software always shows me the warning window of low fee.
Maybe there is a threshold got from the net and I by chance broadcast the transcation when the software hadn't got the number?
In fact, after reading your message, I tried and successed once when click the preview button with 0 fees, but when i changed a receive address I just could't review it and so did i ater on.
The lowest fee i can set is about 0.08 CNY with a typical 226 bytes of transcation but may also take quite a long time.But a 1 CNY fee may work well if not in a hurry.