I bought my galaxy s 25 ultra from US and in india its not getting 5g network, i tried doing esim and i talked with jio and vi about it and also got new sims, still im not getting 5g on my device, i am regretting buying a samsung product. Can some one help me with this, what should i do?
You're not alone. Many users who import Samsung Galaxy devices (especially US models) run into 5G network compatibility problems in India, mainly due to differences in supported 5G bands and software restrictions.
🔍 Here's a breakdown of what's likely happening: ✅ 1. Hardware Band Support
The US version of the Galaxy S25 Ultra may not support the same 5G frequency bands used by Jio (SA) and Vi/Airtel (NSA) in India.
Jio uses 5G SA (Standalone) — needs full support for n28, n78, n258 bands. Airtel & Vi use 5G NSA (Non-Standalone) — mainly n78, with LTE anchor bands.
➡️ If your phone doesn't support the correct bands (especially n78, n28, or lacks NSA/SA switching capability), 5G won’t work, no matter what SIM you insert.
⚙️ 2. Software Region Lock / CSC Code Issue
Samsung applies software locks (based on region/CSC) which can disable 5G in unsupported markets even if the hardware technically supports it.
Your US model likely has CSC like XAA, VZW, or TMB. Indian 5G support is enabled under CSCs like INS (India unlocked). Changing CSC is risky on Samsung and not officially supported, but some advanced users attempt this via SamFW Tool or SamKey (can void warranty or brick device). ✅ What You Can Try Now 🔁 1. Check and Compare 5G Band Support
Check your model’s full band support:
Dial *#1234# and note down the model number (e.g., SM-S928U). Visit GSMArena or Samsung’s global website to compare it to the Indian model (SM-S928B or SM-S928E). Verify if n78, n28, and n1 are supported. 📶 2. Test with Airtel SIM (NSA-based)
Since Airtel uses NSA (more compatible with US models), try inserting a fresh Airtel 5G SIM in Slot 1 (physical SIM, if possible). Sometimes 5G only works on SIM slot 1.
🔄 3. Manually Force 5G Mode Dial *#*#4636#*#* → Phone Info → Set Preferred Network Type → Select NR/LTE. Or try third-party app like Samsung Band Selection (requires USB Debugging & ADB). 🧪 4. Install Indian Firmware (Only If You’re Advanced User)
Warning: This can void warranty and may brick your device.
Tools: Odin + Indian firmware from samfw.com. Or change CSC via SamKey (paid tool) or SamFW Tool (free). Risks include data wipe, network lock, bootloop, loss of updates. 🧩 5. Use LTE Only for Now (Workaround)
If 5G isn't available, ensure 4G LTE is working at full speed, and consider using Wi-Fi 6 if available at home for high speeds.
❌ What NOT to Do Don’t flash without knowing your model’s bootloader status. Don’t rely on Jio 5G with a US phone — Jio SA 5G is harder to get working on non-Indian firmware. Avoid rooting if you’re not comfortable — could disable Knox, Samsung Pay, etc. 🙋♂️ Final Suggestion
If you just bought the phone and are within return/refund window, strongly consider returning it or reselling it locally and buying an Indian variant (SM-S928E/DS) that is fully certified for local 5G bands and services.
