I find that support is so bad that when this happens I change out the phone. Here, phones are getting too cheap so I could burn through that many bucks trying to get it fixed. Try another phone.
I'm at a bit of a loss with this one, so hope someone can help!
Been using a cheap Huawei Ascend Y330 for about a year no without problems. Was bought unlocked from Carphone Warehouse online, and I used it with a Pay Monthly SIM bought separately from Three in the UK.
Recently moved to Spain and bought a Pay-as-you-Go SIM from Orange. It works fine in an old 2G handset I have spare, but just doesn't work in my Huawei - either it says 'No SIM inserted' or simply doesn't receive any cell coverage. Worried my Huawei might NOT have been unlocked, I took it to a store here to check and they confirmed it was already. I've been to the Orange shop several times now and they don't have a clue!
Today, for the first time, the Huawei accepted the SIM (asked me for the PIN as you would expect), and my 3G worked fine for an hour or so, then suddenly cut out again. I haven't been able to get it working again since.
Anyone know what might be happening and what I could do (i.e. changing settings on the Huawei) to resolve it? Just seems stupid to have to buy a new phone when I know the SIM works fine in another phone, and my phone works fine with another SIM!