r/Tangem

I’ve been trying to send my friend some BTC for some reason every single time I get to the confirmation page it is telling me that the network is unavailable to actually do the send. Is anybody else having this problem right now?

I have a technical question regarding BTC transaction signing on iOS using NFC.

From what I understand, iOS NFC APDU communication sessions have a limited active time window (around ~20 seconds for continuous APDU exchanges per session, depending on system constraints).

In a BTC transaction scenario where there are 30+ UTXOs to sign, I’m concerned whether the signing process can be completed within a single NFC session.

I also noticed in your documentation that a single signing flow can theoretically handle ~700 inputs within ~1 minute. This seems to exceed the practical iOS NFC session time window.

https://preview.redd.it/sa8n89s0erah1.png?width=2026&format=png&auto=webp&s=b35922059dbe8957e94c9f0b53e5db1e930c9bf8

My questions are:

1. If a transaction requires 30+ UTXOs, can all signing APDU commands reliably complete within one iOS NFC session?
2. If the NFC session times out before all signatures are completed, what happens to the transaction process?
   • Does it fail completely?
   • Or can it resume/retry from the last state?
3. Are there any internal batching / chunking mechanisms on the card side to mitigate NFC timeout constraints?

Thanks in advance.

I'm curious how people here actually spend their crypto, if they spend it at all. Do you cash out through an exchange before making purchases or use a crypto card?

Buying crypto has become incredibly easy over the past few years, but actually using it for everyday purchases still feels more complicated than it should be.

What's your current workflow and what's the biggest friction point?

If you could change one thing about spending crypto, what would it be?

Trying to pay attention to a relatively new cold wallet, but noticed there is an option to earn a tiny bit of yield. Does anyone have experience doing this? I don't plan on moving things out of Tangem for years, so if it can earn something, that'd be good. My investments will do the heavy lifting but if crypto hopium crap shoots can pay off a little, it would be nice.

I currently have BTC, ETH, XRP and XLM in there if anyone has experience with yield on those coins. Thanks.

I've been using Tangem for a few months, mostly just holding funds. Recently I noticed the swap feature and saw that one of the providers is simpleswap. First time hearing about it. Has anyone used it inside Tangem? I'm used to sending coins to an exchange, swapping there, then sending back. This direct setup is new to me, so I'm trying to understand whether it's normal and what to watch for.

I’ve been having this issue for the last 2.5
+ months. There’s been about 6 app updates but it doesn’t seem to matter, the app freezes at a certain point almost every single time. I’ve been back and forth with the support but I can’t seem to get an answer. Anyone else having a similar issue?

Why are the swap fees so high on Tangem? I know it automatically uses the dex with the lowest fees at that moment, but it’s asking me something like $25 for a BNB to BTC swap… what the heck? Is it because a lot of people are trading now so the prices dinamically adjust to a higher rate?

After activating the new dynamic addresses feature within the Tangem app, I transferred some funds to myself. Although they were credited to my wallet balance, they are not showing up in the transaction history, and several days have already passed. The transaction history only shows the transactions made to the original address from back when there was no option for dynamic addresses. Does anyone know how to make the transaction history show the transactions for all of my addresses? Otherwise, it's impossible to keep track of them.

Thank you!

I’ve been unable to see my BTC balance on my Tangem wallet.
The message reads “ some networks are unreachable”
Anyone else getting this message?

Now that we have dynamic addresses, what is your most requested feature of Tangem?

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