How to Fix Xiaomi Phone Losing 5G Signal or Switching Back to 4G
5G dropping to 4G can be caused by your phone's network mode settings, 5G coverage gaps, SA/NSA mode mismatch, or carrier-side issues. Here's how to fix each.
Step 1 – Check 5G Coverage
5G isn't everywhere — your phone correctly falls back to 4G outside 5G coverage:
1. Check your carrier's 5G coverage map (carrier website/app).
2. If you're in a covered area and still dropping, proceed to the next steps.
Step 2 – Set Network Mode to 5G/4G/3G/2G Auto
- Settings → SIM cards & mobile networks → [your SIM] → Preferred network type.
- Select 5G/LTE/3G/2G (Auto) — this allows the phone to use 5G when available.
- Avoid selecting 5G only — this drops signal entirely outside 5G coverage.
Step 3 – Toggle Airplane Mode
A quick reset for network registration:
1. Pull down Quick Settings → enable Airplane mode for 10 seconds.
2. Disable Airplane mode → wait for network to re-register.
Step 4 – Check SA vs NSA 5G Mode
Some carriers use Standalone (SA) 5G, others use Non-Standalone (NSA) — a mismatch causes frequent drops:
1. Settings → About phone → SIM status → note network type.
2. Contact your carrier to confirm whether they use SA or NSA 5G.
3. On some Xiaomi models: Settings → SIM → 5G settings → SA/NSA mode — match to your carrier's network type.
Step 5 – Reset APN Settings
Incorrect APN can prevent stable 5G registration:
1. Settings → SIM cards → Access Point Names (APN).
2. Tap the three-dot menu → Reset to default.
3. Reconnect.
Step 6 – Update Carrier Settings
- Insert SIM → Settings → About phone → Carrier settings.
- If an update is available: tap Update — carrier settings updates fix network issues.
Pro Tips
- 5G battery drain is higher than 4G — if 5G is not reliable in your area, manually select 4G LTE preferred to save battery.
- mmWave 5G (ultra-fast, ultra-short range) is found only in select Xiaomi flagships for specific markets — most users are on Sub-6GHz 5G which has broader coverage.
