[HTC EVO 3D] menz83:
Hey, I posted this over at AVForums and didnt get a response and thought that you guys over here are probablt better informed. Below is a quote of the thread I started:

Well to start off, i'll tell you I am on the one plan with 3 and have a brand new sim free htc evo 3d.

Ive had the phone for about 2 weeks and it has worked perfectly ever since I got it. About 4 days ago, I noticed that texts were taking hours to come through. I then noticed that calls were never coming through and going straight to voicemail. Called 3, they blamed the phone but made sure call diverts were off anyway.

Calls were still going straight to voicemail but occasionally when phoning my number, I would get the dial tone but my phone wasnt ringing. I then put my misus t-mobile sim into my phone but I was getting the exact same problem, no calls were coming through. Couldnt put my sim into my misus phone as its sim locked.

I called 3 again, they said it must be the phone. I phone Amazon, they say phone HTC. HTC couldnt help so Amazon agreed to replace the phone. I now have old and new phone in possession. Using my old phone earlier today, I could no longer send text messages but I could receive them ok. The occasional call was coming through but most werent.

Ive now just set up the replacement phone. Everything was working fine for the first 5 minutes but now I cant send texts and calls arent coming through again.

Logically thinking, it surely cant be the phone and must be the sim card, but then again, my misus t-mobile sim showed the same problems in my phone which suggests it is the phone!

Im obviously going to phone 3 tomorrow but I want to be prepared for my argument. If it does end up being the sim, how can I explain to Amazon that I have opened the replacement phone but now need to send it back because there was nothing wrong with my phone in the first place. Surely they would be entitled to charge me or something for doing that?

Hope it all makes sense and I look forward to your responses!

EDIT: Forgot to mention that data is working fine. my 3g connection did drop at work the other day for no apparent reason, but calls and texts were working fine during this period, I guess its more when connected to 3g. There is no gsm only mode to test the phone either!

EDIT 2: Sometimes when calling my phone, I get the dial tone but my phone doesnt ring. However when the screen is on and the phone is out of standby, my phone receives calls fine! It does sometimes goes straight to voicemail but its just so confusing! I just did a test there, phone in standby, called it from my landline. I get the dial tone, but the phone doesnt ring. Whilst im still calling it, I wake my phone and it starts ringing! What the hell is going on!!!

Just a quick update and really hoping someone can offer some input!

I am at work just now, about 5 miles from my home address. So far today, my phone has been working fine at work. I visted the 3 store just round the corner from here, told him my story and he sadi it must be the handset due to the same issue with a t-mobile sim. I did mention the 3/t-mobile network sharing agreement and how they could be connecting to the same masts but he was adamant that no such thing exists. He also argued that the auction for the old analogue spectrum was for additional 3g capacity and not 4g. I did argue with him but he was clueless!

Anyways.... My phone worked fine in the shop so he said test with another sim card and if the problem persists, they would change the sim card. Ive came back to work and again, everything works well. I tried a vodafone sim card and again, all is ok!

When I think about it, my phone has pretty much worked fine when at work apart from not being able to connect to 3g the other day. This leads we to believe that there was be something wrong with my local mast at home, but if this was the case, why has it not been widely reported? Then again, the T-Mobile sim didnt work in my phone when at home, but worked fine in my misus htc desire. I have noticed that she is connected to 't-mobile orange' for 3g when its usually just 't-mobile'. Is it that her phone recognises a problem so switches to an orange mast?

This is doing my head in!

Thanks

EDIT: Sorry for posting in the wrong thread, I did wonder if I goty it right but clearly I didnt!