From your screenshot, WhatsApp is open, but the keyboard is not appearing, so you cannot type your number. This usually happens because of one of these problems on Tecno Spark phones: Keyboard app stopped working Restart your phone first. Then open WhatsApp again and tap the phone number box. Gboard or keyboard disabled Go to: Settings → System → Languages & input → On-screen keyboard Make sure Gboard or your keyboard is enabled. Force stop keyboard Go to: Settings → Apps → Gboard (or keyboard app) Tap: Force Stop Storage → Clear Cache Then reopen WhatsApp. WhatsApp frozen Go to: Settings → Apps → WhatsApp Tap: Force Stop Storage → Clear Cache Open it again. Screen glitch Sometimes Tecno phones freeze touch input. Try: Lock and unlock the phone Rotate the screen Restart the device Try another app Open Notes or SMS and tap to type. If keyboard still does not appear anywhere, the keyboard app is the problem. If keyboard works there but not on WhatsApp, reinstall WhatsApp. Update keyboard Open Play Store and update: Gboard WhatsApp Last solution Uninstall WhatsApp and install it again from Play Store. Also, when entering your Nigerian number: That's all for today do it thank me later