A guide to SMS verification services - why VoIP numbers get blocked and how real SIM cards solve the problem.
Most cheap SMS services use VoIP (Voice over IP) numbers. Platforms have learned to detect and block them:
VoIP Number → Blocked by Google, Amazon, Discord, Telegram, most crypto exchanges
Virtual Number → Flagged as suspicious, verification fails
Real SIM Card → Works like a normal phone number
If you've tried a cheap SMS service and had verifications fail, this is why. Platforms maintain databases of VoIP ranges and reject them outright.
Real SIM card numbers are issued by mobile carriers - the same numbers used by regular phone customers. Platforms can't block them without blocking legitimate users.
| Number Type | Source | Platform Detection | Success Rate |
|---|---|---|---|
| VoIP | Internet providers | Easily detected | 20-40% |
| Virtual | App-based services | Often flagged | 50-70% |
| Real SIM | Mobile carriers | Not detectable | 95%+ |
The difference is infrastructure. Real SIM numbers exist on carrier networks, pass HLR (Home Location Register) lookups, and behave identically to regular phone numbers.
Create accounts on platforms that block VoIP numbers:
- Google, Amazon, Microsoft
- Discord, Telegram, WhatsApp
- Crypto exchanges (Binance, Coinbase, Kraken)
- Social platforms (Instagram, TikTok, X)
- Keep your personal number private
- Separate work and personal accounts
- Temporary numbers for one-time verifications
- Create accounts for clients or team members
- Test signup flows across regions
- Manage multiple business profiles
- Test SMS verification flows
- Automate account creation for testing
- Verify OTP implementations
Ask if numbers are actual SIM cards or VoIP. The success rate difference is massive.
Check if the service works with your target platforms. A 95% success rate means nothing if that 5% is your specific use case.
Recycled numbers can have issues - previous owner's accounts, blocked status. Fresh numbers perform better.
SMS should arrive in seconds, not minutes. Slow delivery often means unreliable infrastructure.
Does the provider require KYC? Do they accept crypto? How much data do they store?
1. Select country and target platform
2. Get assigned a real SIM number
3. Use number for verification
4. Receive SMS instantly
5. Complete verification
The key is step 2 - you're getting a number from an actual SIM card in a real phone or modem, not a virtual number generated by software.
VoidMob SMS Verification uses real carrier SIM cards:
- 95%+ Success Rate - Real SIM infrastructure, not VoIP
- 100+ Platforms - Google, Amazon, Discord, Telegram, crypto exchanges, and more
- Instant Delivery - SMS arrives in seconds
- No KYC - Crypto payments (BTC, ETH, SOL), no identity verification
- API Access - Automate verification flows
Works with platforms that block VoIP:
| Category | Platforms |
|---|---|
| Tech | Google, Microsoft, Amazon, Apple |
| Social | Discord, Telegram, WhatsApp, Instagram, TikTok, X |
| Crypto | Binance, Coinbase, Kraken, Bybit, OKX |
| E-commerce | eBay, Shopify, Stripe |
Maintained by VoidMob - reliable SMS verification with real SIM numbers.