sim card error - S740, S743 General

I have a s740 and i use to use it all the time, well i broke my screen and got another phone. The other day i found a screen on ebay and replaced it. When i was finished i put my sim card in it and it worked for a little while, but when i restarted the phone it stopped working. The phone knows a sim card is inserted, but wont recognize centennial wireless service. Could it be that i have to unlock it again?? Please reply if you have any tips

Related

My hero stopped reading the SIM card

I have an unlocked HTC hero. Didn't drop it or anything, just put it to charge.
And now it's saying there is no SIM card in it.
I've tried moving everything around, still nothing.
Turns out the SIM card died
Problem fixed.

tmobile gs2 not reading sim card

So today randomly my phone wont get network any where so i just removed the sim and reinserted it in and still nothing so i thought it might be the sim card, so i got a new sim card but still the phone isn't reading the sim card, its like there's not sim in it , and this phone is only 5 days old it hasn't been dropped anywhere
please help what should i do
i did a factory reset but still nothing
thanks
take it back and get it replaced if its only 5 days old

[Q] My phone had an issue?

I tried out a new sim card with an adapter nano to regular and all was good, then swapped back to my regular sim and the phone doesn't recognise the old sim card?
I've tried factory reset didn't work
Trying recovery now
Stuck my sim card into the tablet and it works fine.
Weird thing I stuck a virgin one it works and a three network card also works but will not accept my old sim card again?
The phone was bought unlocked and sim free had it for three years only thing done under warrantee was a USB socket that snapped but HTC did fix that?
Any suggestions or is it just time for a new phone?
Thanks
Jay

will not recognize sim card

Need help with this one... I just bought the phone from someone on Facebook. Well phone is unlocked and when I put my att sim card in it says inserted sim and restarts but still says no sim when it restarts. I called Sony and they told me to hook it to computer and download the software again so I did and it still has the same problem. I put my wife sim card it it it will read that there's a sim card inserted but will never give me cell service. I don't know what else to do. Please if anyone knows what I could try please let me know.. Thanks
kennygiles29 said:
Need help with this one... I just bought the phone from someone on Facebook. Well phone is unlocked and when I put my att sim card in it says inserted sim and restarts but still says no sim when it restarts. I called Sony and they told me to hook it to computer and download the software again so I did and it still has the same problem. I put my wife sim card it it it will read that there's a sim card inserted but will never give me cell service. I don't know what else to do. Please if anyone knows what I could try please let me know.. Thanks
Click to expand...
Click to collapse
Check your mobile network - access point name....does it have any APN service option....
Yeah, do what Martin wrote, and also try yet another SIM card. If it detected your wife's SIM, then it's probably not a hardware issue. May I ask how old your SIM is?
The SIM tray on the Ultra is also one of the worst designed trays in the history of time, so be 100% sure that you've put it in correctly.
The sim is only maybe 6 months old.. I am going to go in the morning and see about another sim. Maybe it will work.
kennygiles29 said:
The sim is only maybe 6 months old.. I am going to go in the morning and see about another sim. Maybe it will work.
Click to expand...
Click to collapse
Okay, so it's definitely not the SIM card, but the phone did detect your wife's SIM, so I'm not sure what the issue could be
I will post what I find out tomorrow when I take it to att tomorrow
OK so I took the phone to my phone provider and got a new sim and it works great now. But when I make a call on it the screen goes black and can't turn it back on until the phone hangs up even if the phone is nowhere near my face. I have looked to maybe keeping the phone on during call but there is no setting for that. I have read a few forms about this and there's only stuff about screen protector or cases which I am not using either of them. Please if anyone know something about this please help.. Thanks
kennygiles29 said:
OK so I took the phone to my phone provider and got a new sim and it works great now. But when I make a call on it the screen goes black and can't turn it back on until the phone hangs up even if the phone is nowhere near my face. I have looked to maybe keeping the phone on during call but there is no setting for that. I have read a few forms about this and there's only stuff about screen protector or cases which I am not using either of them. Please if anyone know something about this please help.. Thanks
Click to expand...
Click to collapse
1. What Android version do you have installed?
2. Are you using a screen protector?

SIM NOT DETECTED! need help!!

HI GUYS, Im having an issue with my phone(HTC dna) that is getting beyond frustrating. I got the phone like a month ago off of something it worked fine for the first week..then one day randomly stopped reading my sim card.. Im not a total dummy so ive done and ruled out the obvious , my firmware was verison 4.09.605.4 I just updated it to the current one. 4.09.605.8 so i ruled out firmware being an issue. i then went to amazon and bought the new board were the sim card attaches and the audio jack attaches i just installed that yesterday and still nothing!!. I even bought a new up sim card tray still no.. when the sim card TRAY isnt installed i get a message when about a im card not detected ,ect. when i push the tray in that message goes away which indicates it is trying to read...but in the corner you see a sim card with x through it which means no sim card..I've replaced my sim card 3 times just to rule out that but my sim card works in my other phone just not this one.. When i first got this phone a month ago it worked fine!! no troubles.. Im on the ATT go plan..i put my sim in and nothing..but now it just doesnt work..ive tried hooking my phone to my computer and opening htc sync manager and tried doing the repair and nothing ive litterally tried and ruled out most of the obvious, Is this a known problem with these phones? Can anyone please!! help me with a solution i want this phone so badly..i love this phone!!..ill be waiting for replies..hopefully someone can drop knowledge to me! thank you!
I switched over to straight talk and had the same thing happen for awhile. Changed the tray and still didn't work. What ended up straightening it out for me was either resetting the apn settings or the new sim card i got. After I did those things it worked fine.

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