Yes — a real Japan mobile number (+81) can receive the Signal 6-digit code by SMS or voice call. Get one in under a minute: a single-use Signal code from $1.55, or a number you keep from $12.60/month with unlimited incoming SMS and calls. Email sign-up, crypto payment, no ID.
Monthly
$12.60
per month
Yearly
$63.00
per year
Plans: unlimited incoming SMS & calls, 500 SMS + 1,000 minutes out every month. Renew as long as you want.
Digits are masked. The full number is shown once it is assigned to your account.
Step by step
Signal asks for your number at the registration screen right after installing Signal. Expect a 6-digit code; it can arrive by SMS or voice call.
Get your Japan number
Sign up at PhoneBorn with an email, top up with crypto and choose Japan: a monthly plan ($12.60) if you want to keep the account, or a single-use Signal OTP number ($1.55) for one code.
Open Signal
Go to the registration screen right after installing Signal.
Enter the +81 number
Select Japan (+81) in the country picker and paste the number from your dashboard without a leading 0. Japan mobiles look like 090 xxxx xxxx → +81 90 xxxx xxxx.
Enter the 6-digit SMS code
Enter the 6-digit SMS code — or choose “Call me” and take the code by voice (incoming calls are unlimited on every plan).
Create a Signal PIN and turn on Registration Lock
Create a Signal PIN and turn on Registration Lock.
Day-to-day life in Japan runs on LINE, X and Instagram, yet Signal remains the app for private conversations without exposing your personal number. A +81 number keeps that account tied to the country without using your personal SIM.
Students and working holiday: People on study or working holiday visas in Tokyo and Osaka use a Japanese number for part-time job applications and apartment hunting.
Signal identities are tied to the number; losing it means losing the registration.
Japan runs on LINE, and many domestic services, from PayPay to Mercari, ask for a Japanese mobile number during sign-up. Because tourists usually cannot get a voice SIM, a +81 number is a practical option for learners, collectors and people planning a move.
Local context
Voice SIM contracts in Japan generally require a residence card, so short-term visitors usually only get data-only SIMs or eSIMs. A Japan number from PhoneBorn needs no SIM and no ID — only an email.
| App | OTP price | Guide |
|---|---|---|
| Google / Gmail | $1.79 | Google / Gmail guide |
| $1.90 | WhatsApp guide | |
| Telegram | $2.14 | Telegram guide |
| $1.67 | Instagram guide | |
| $1.55 | Facebook guide | |
| ChatGPT | $2.14 | ChatGPT guide |
| TikTok | $1.55 | TikTok guide |
| Discord | $1.43 | Discord guide |
| X (Twitter) | $1.67 | X (Twitter) guide |
| Binance | $2.62 | Binance guide |
Included in every plan
Plan allowances apply to numbers you keep (monthly or yearly). Single-use OTP numbers are a separate product: one code, refunded automatically if no code arrives.
If your number has not sent or received a single SMS or call, you can get a full refund within 7 days of purchase — no questions asked.
Open the number in your dashboard and press “Request refund”. Eligible refunds are returned to your wallet instantly. Refund policy
FAQ
Create an account with just an email, top up with crypto and get a real mobile number — SMS and calls included — in under a minute.