# Problem With ZWalletTest (Android) **URL:** \ **Category:** Technical Support\ **Created:** [February 12, 2023, 7:15pm UTC](https://forum.zcashcommunity.com/t/problem-with-zwallettest-android/43996 "2023-02-12T19:15:10Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Bamblon](https://avatars.discourse-cdn.com/v4/letter/b/6bbea6/32.png) [@Bamblon](https://forum.zcashcommunity.com/u/Bamblon)\ **Post date:** [February 12, 2023, 7:15pm UTC](https://forum.zcashcommunity.com/t/problem-with-zwallettest-android/43996/1 "2023-02-12T19:15:10Z")
Hello, I installed ZWalletTest on my device, and get some test coins on it (about 0.422 test-ZEC) - I am trying to transfer a small amount (0.002) from the wallet to my zcashd wallet - but I am always getting the following error: bad-sapling-bundle-authorization - and no transaction happens. Could someone advice me - Why do I get this error, and how to overcome it? Also - are there any other Android Zcash wallets that support testnet? Thank You! ---
**Author:** ![Autotunafish](https://sea2.discourse-cdn.com/zcash/user_avatar/forum.zcashcommunity.com/autotunafish/32/7827_2.png) [@Autotunafish](https://forum.zcashcommunity.com/u/Autotunafish)\ **Post date:** [February 13, 2023, 12:17am UTC](https://forum.zcashcommunity.com/t/problem-with-zwallettest-android/43996/2 "2023-02-13T00:17:42Z")
Zwallet test was last updated about a year and a half ago during v4.4.1 and so would not support Or hard or v5 tx format among other things. Nighthawk may work. It appears to need compiled for testnet looks like the installation to the device is automatic. [GitHub - nighthawk-apps/nighthawk-wallet-android: Private Money in your pocket.](https://github.com/nighthawk-apps/nighthawk-wallet-android) ![Screenshot_20230212_171640_Brave](https://global.discourse-cdn.com/zcash/original/3X/5/a/5aeecca9032e99afe8b18632174ba99072cfb950.jpeg) ---
**Author:** ![aiyadt](https://avatars.discourse-cdn.com/v4/letter/a/e9bcb4/32.png) [@aiyadt](https://forum.zcashcommunity.com/u/aiyadt)\ **Post date:** [February 13, 2023, 1:24am UTC](https://forum.zcashcommunity.com/t/problem-with-zwallettest-android/43996/3 "2023-02-13T01:24:41Z")
For Nighthawk Wallet on Android, make sure to switch to branch `ns/base` and select `ZcashTestnetDebug` as the build variant for compiling. > **[GitHub - nighthawk-apps/nighthawk-wallet-android at ns/base](https://github.com/nighthawk-apps/nighthawk-wallet-android/tree/ns/base)** > > ns/base ---
**Author:** ![Bamblon](https://avatars.discourse-cdn.com/v4/letter/b/6bbea6/32.png) [@Bamblon](https://forum.zcashcommunity.com/u/Bamblon)\ **Post date:** [February 13, 2023, 2:04pm UTC](https://forum.zcashcommunity.com/t/problem-with-zwallettest-android/43996/4 "2023-02-13T14:04:43Z")
Thank You very much @Autotunafish and @aiyadt ! I have successfully compiled Nighthawk for testnet - it’s synchronizing now. Let’s see if the wallet will be able to transfer test-Zec as planned. ---
**Author:** ![Bamblon](https://avatars.discourse-cdn.com/v4/letter/b/6bbea6/32.png) [@Bamblon](https://forum.zcashcommunity.com/u/Bamblon)\ **Post date:** [February 14, 2023, 10:31am UTC](https://forum.zcashcommunity.com/t/problem-with-zwallettest-android/43996/5 "2023-02-14T10:31:06Z")
Well - Now I understand why this wallet is named “Nighthawk” :)) - it took a whole night to download and re-scan blockchain. However - I can receive and send TAZ now - as expected. Thank You! ---
**Author:** ![zancas](https://sea2.discourse-cdn.com/zcash/user_avatar/forum.zcashcommunity.com/zancas/32/42011_2.png) [@zancas](https://forum.zcashcommunity.com/u/zancas)\ **Post date:** [February 16, 2023, 4:53pm UTC](https://forum.zcashcommunity.com/t/problem-with-zwallettest-android/43996/6 "2023-02-16T16:53:15Z")
Hi folks! ZingoLabs has a similar issue that we’re tracking here: > > > Attempts to send are sporadically causing a \`bad-orchard-bundle-authentication\` …response from lightwalletd/zcashd. It doesn't seem to be unique to zingo-mobile, so it's likely an issue with an underlying dependency. We're working on root-causing this. https://github.com/zcash/zcash/issues/6440 Since we think there’s a common cause at a lower layer we’ve opened an issue here: > > > As mentioned \[here\](https://github.com/zcash/zcash/pull/6046/files#r1107900829) …we're getting an error for some not-yet-well-defined subset of our Orchard transactions. > > We don't see it for all transactions, and since our transaction construction logic is the same library for all our clients. > > At least one device produces the error on all transactions, and many devices have never produced the error. Let’s gang up on this as a community! We can rule out more possible causes by adding to this list of observations! > > > As mentioned \[here\](https://github.com/zcash/zcash/pull/6046/files#r1107900829) …we're getting an error for some not-yet-well-defined subset of our Orchard transactions. > > We don't see it for all transactions, and since our transaction construction logic is the same library for all our clients. > > At least one device produces the error on all transactions, and many devices have never produced the error. ---
**Author:** ![hanh](https://sea2.discourse-cdn.com/zcash/user_avatar/forum.zcashcommunity.com/hanh/32/27853_2.png) [@hanh](https://forum.zcashcommunity.com/u/hanh)\ **Post date:** [February 16, 2023, 6:58pm UTC](https://forum.zcashcommunity.com/t/problem-with-zwallettest-android/43996/7 "2023-02-16T18:58:05Z")
I think this deserves its own thread. ---
**Author:** ![zancas](https://sea2.discourse-cdn.com/zcash/user_avatar/forum.zcashcommunity.com/zancas/32/42011_2.png) [@zancas](https://forum.zcashcommunity.com/u/zancas)\ **Post date:** [February 16, 2023, 7:01pm UTC](https://forum.zcashcommunity.com/t/problem-with-zwallettest-android/43996/8 "2023-02-16T19:01:24Z")
Per @hanh 's suggestion I created this thread: > [@Error 'bad-orchard-bundle-authentication' occurring in lightwallets](https://forum.zcashcommunity.com/t/error-bad-orchard-bundle-authentication-occurring-in-lightwallets/44023): > > This thread promotes an issue that was previously tracked here: ---
**Author:** ![aiyadt](https://avatars.discourse-cdn.com/v4/letter/a/e9bcb4/32.png) [@aiyadt](https://forum.zcashcommunity.com/u/aiyadt)\ **Post date:** [February 17, 2023, 5:53pm UTC](https://forum.zcashcommunity.com/t/problem-with-zwallettest-android/43996/9 "2023-02-17T17:53:56Z")
You’re welcome. The Nighthawk is indeed a nocturnal bird, but that is really not the inspiration for the wallet name. 😄