Cannot spend from new address on wallet

[asharma]

Hello,

I wanted some help in determining an unexpected address generation.

I have been using a smartphone wallet on iPhone (bitwallet http://www.sollico.com/bitwallet/)  and have made past transactions on it. 

The most recent tx had been to the address on an exchange.

However, it sent the rest of BTC to a new address on same wallet which asks for a private key - I just have the private key for my old original address.

After talking to support they say the private key should be on there but I don't think they fully understand what I am trying to say. The new random address that was generated has the default name "My Bitcoin Address" with no private key.

How do I spend the BTC from this new address?

Thanks

[BitMaxz]

I can't access the site and i feel suspicious here but do you have any bitcoin address from this wallet can you share with us including the old bitcoin address and recent bitcoin address..
Let me check if why you can't spend your bitcoin..
Do you have any private key save with that wallet? if not try to open your my wallet> and choose keys tab and your public and private key is there
It should be the same from the image here the 3rd part http://www.sollico.com/images/bitWallet_Screenshot.png
And then you can recover your private key in other wallet and try to spend it and maybe that wallet is having some bugs since i can't access the site you given..

[Potato Chips]

I'm not familiar with the app and I can't test it either as I don't have any ios device. Although I found the app in appstore and luckily they provided some essential details.

bitWallet supports two types of wallets; Classic wallets accept all Bitcoin addresses and private keys. New random addresses can be generated, and existing keys can be scanned and imported. Hierarchical Deterministic (HD) wallets derive all accounts, addresses and private keys from a single master extended key. HD wallets adhere to the BIP32 / BIP44 / BIP49 address generation methods and wallet structures. Wallet seeds and deterministic keys are derived from BIP39 mnemonic sentences.

So if you happen to have created a HD wallet, then you should also have your seed (Random words) or maybe you can access it on the app but in most cases the wallet will prompt you to backup your seed when you created a new wallet.

If you have your seed you can try these:

1). Use a tool to generate your private keys (Run this offline, preferably with no network connection)

you could try using the BIP39 Mnemonic Code Converter (https://iancoleman.github.io/bip39/ - create offline copy etc), put in your seed, click the BIP44 tab... and see if it creates your addresses... if you see your "receive" address(es), try changing the "External/Internal" value to 1 (BIP44 derivation path: m/44'/0'/0'/1)... that should then generate your "change" addresses...

2). Import it to electrum and spend it there (You can also view your private keys)

Tutorial: https://bitcoinelectrum.com/restoring-your-standard-wallet-from-seed

*When electrum prompts you to enter your seed, Click options and tick the BIP39 Seed Box