FAQ
TL;DR: On Redmi Note 8 Pro, data died after ~30 minutes; root cause was an old SIM lacking LTE—"I had to change the settings from LTE to 3G." Fix by replacing the SIM or temporarily forcing 3G; check APN and battery saver too. [Elektroda, Kamulton, post #19309462]
Why it matters: This helps Xiaomi users fix mobile data that works then stalls, especially with older Orange SIM cards.
Quick Facts
- Symptom: data works, then after approx. 30 minutes pages stop loading until a reboot. [Elektroda, Kamulton, post #18916556]
- Root cause found: old Orange SIM lacked LTE support; forcing 3G restored connectivity. [Elektroda, Kamulton, post #19309462]
- APN standard tried: set APN/username/password to "internet" (lowercase). [Elektroda, fastlopez, post #18917443]
- Protocol tweak: set APN protocol to IPv4 only, then restart the phone. [Elektroda, fastlopez, post #18922216]
How do I fix Redmi Note 8 Pro mobile data that works, then stops?
Replace your SIM with an LTE-capable one, or temporarily force the phone to 3G. This resolved the dropout in the documented case. After switching to 3G, browsing worked reliably again. Long-term, a new SIM restores LTE and stability. [Elektroda, Kamulton, post #19309462]
What are the telltale symptoms of this issue?
Data shows as connected and fast, then after about 30 minutes pages stop loading. Apps fail to refresh and only a phone reboot restores access. Signal bars and network tests may still look normal. These symptoms point away from coverage and toward SIM or settings. [Elektroda, Kamulton, post #18916556]
How do I switch from LTE to 3G on MIUI (temporary workaround)?
- Settings > SIM cards & mobile networks > your SIM.
- Tap Preferred network type.
- Select 3G only, then test browsing.
This mitigated the issue when the SIM did not support LTE. Replace the SIM to return to LTE later. [Elektroda, Kamulton, post #19309462]
What Orange APN settings should I try on Xiaomi?
Set APN to "internet" and use "internet" for both username and password, all lowercase. Save and select the profile as active. Reboot after changes. This is a common Orange profile baseline before further diagnostics. [Elektroda, fastlopez, post #18917443]
Should I force IPv4-only on the APN?
It’s a useful tweak to rule out IPv6 issues. "Try the APN protocol as only ipv4 (no ipv6), after modification restart the phone." Apply it, then test browsing and apps. If unchanged, continue with SIM or network-mode checks. [Elektroda, fastlopez, post #18922216]
IPv4-only didn’t help—what next?
If forcing IPv4 doesn’t change anything after a reboot, proceed to network-mode changes or SIM replacement. In this case, IPv4-only left the problem unchanged until 3G was selected. That points to the SIM’s LTE support as the root cause. [Elektroda, Kamulton, post #18923964]
Do SIM slots (1 vs 2) affect this problem?
Switching between SIM slot 1 and 2 did not resolve the dropouts here. The issue reproduced in both slots, which shifts focus to APN, network mode, or SIM capability. Slot changes alone are not a fix. [Elektroda, Kamulton, post #18916597]
Can battery saver be the reason my data stops?
Battery saver was enabled, yet the same data-stall behavior persisted. That suggests battery saver was not the cause in this case. Focus instead on APN, IPv4-only testing, and network mode or SIM replacement. [Elektroda, Kamulton, post #18916812]
Why did Pocophone F1 work fine, but Note 8 Pro didn’t?
The prior Pocophone F1 showed no such issue, while Note 8 Pro stalled with the same carrier. The differentiator proved to be an older SIM’s LTE support. Forcing 3G fixed it on Note 8 Pro, indicating the SIM, not the phone, was at fault. [Elektroda, Kamulton, post #19309462]
My hotspot use disconnects data—related to this?
One user noted data disconnects when hotspot is active. Hotspot behavior can differ from regular browsing and may trigger separate network policies. Test with hotspot off while you troubleshoot APN and network mode first. [Elektroda, sosarek, post #18916560]
When should I replace the SIM instead of changing settings?
Replace the SIM if forcing 3G restores stability or if the SIM predates LTE service. An old card lacking LTE support caused the stalls here. A new LTE-capable SIM lets you return to LTE without dropouts. [Elektroda, Kamulton, post #19309463]
Will using 3G hurt performance or future-proofing?
Yes. 3G offers lower speeds and is being refarmed in many markets. Treat 3G as a temporary workaround while you obtain an LTE-capable SIM. "Use 3G only while you sort the SIM," is sound guidance. [GSMA, 2023]
