4ka · Slovakia
Top up 4ka in
Slovakia
Refill any 4ka prepaid line in Slovakia with cryptocurrency. We support 7 fixed denominations from 10 up to 100 EUR, settled to the carrier within minutes of your crypto deposit confirming on chain. No account, no KYC, no app.
Last updated ·
- 7
- fixed amounts
- 10–100
- EUR · amount range
- EUR
- local currency
- under 60s
- typical ETA
4ka denominations
Live face values you can buy now. Prices charged in EUR at the carrier rate; you pay the crypto equivalent at the rate of the moment.
Or pick a custom amount
4ka accepts custom top-ups between 8.55 and 100 EUR. Use the form above to enter any value in that range.
4ka mobile prefixes in Slovakia
These 5 local prefixes route to 4ka. If your number starts with one of them, you're on the right network.
About 4ka in Slovakia
4ka is one of the 4 prepaid networks operating in Slovakia, with the dial code +421. Refills are denominated in EUR and settle on the carrier under 60 seconds after our payment confirms on chain.
You don't need a 4ka account, the Slovakia MyCarrier app, a local bank or any in-store kiosk — just the phone number and the crypto. The credit shows up on the SIM exactly the same way as if you'd topped it up at a corner store.
4ka mobile top-up · FAQ
Can I top up 4ka with Bitcoin?
Yes. Pay in Bitcoin (BTC), Monero (XMR), Ethereum (ETH), USDT (TRC/ERC/SOL), Litecoin (LTC), Bitcoin Cash (BCH), Solana (SOL), Dogecoin (DOGE), Dash (DASH), Tron (TRX) or BNB. The 4ka line in Slovakia gets credited within minutes of your deposit confirming on chain.
How fast does the 4ka credit land?
Carrier-side, 4ka typically posts the credit within 30 seconds of our settlement message. End-to-end (you click pay → SIM has credit) it's usually 1-3 minutes on fast chains (LTC, TRX, SOL), up to 10 minutes on slower ones (BTC).
What's the cheapest crypto for a 4ka refill?
For small refills (under $50 USD-equivalent), USDT-TRC20, Tron (TRX), Litecoin (LTC) or Solana (SOL) keep network fees to single cents. Bitcoin works fine but BTC fees can be disproportionate for small top-ups — pick a cheaper chain instead.
Do I need a 4ka or Slovakia account?
No. We talk to 4ka on the back end with the phone number alone. No My4ka portal login, no SIM swap, no local bank, no in-store kiosk. Just enter the number, pick the amount, pay in crypto.
Will 4ka or the recipient see I paid in crypto?
No. 4ka sees a routine top-up at the local face value (EUR). The recipient sees the new balance on their SIM. Neither sees the funding source, your email, or any other payment metadata. From the SIM's side it's identical to a corner-store refill.
Other prepaid networks in Slovakia
Pick a different carrier in Slovakia — same workflow, same coins, same speed.