Update;
1. Took to Sprint store, $35 fee for replacement, they recommended I call Sprint.
2. Called Sprint, no $35 fee if phone not physical damage, then transferred to tech support, same answer and wrote up an E ticket and told me to go back to the store.
3. Called CSR to double check before going to the store, was told there is a $35 fee, prior notes show there is an E ticket but no mention of waiving the $35 fee.
4. OK, I didn't care about the $35 anymore, went into the store. They had to canceled the original ticket but I was told when I get my replacement phone and if there is problem within hours or days I will need to spend another $35 for another replacement...Suck.
5. Called CSR, spoke to a sup, they will credit $35. Sup recommended that I check the phone to make sure it was 100% working before leaving the store. I explain that the $35 is not a big deal to me anymore, what bother me is how they have wasted so much of my time.
6. Took my phone into the store, got a replacement phone(recondition) on Friday, bought the $7 insurance(will keep for 2 months) so I don't have to sit at the store checking everything on the phone is working before leaving the store...so far the phone has been working great, I have 4G.
To all that have the same issue with 4G unknown; I hope my notes helps is deciding what to do.