iPhone 4S dropping network and data at random

For all of you:

http://support.apple.com/kb/TS4148

i have restored mine lets see what happens!!

update: same thing happens! i m unable to send the Text msgs and make a call! it fails and then it starts searching!!

happening here in florida, as well. i bought iphone 4s - arrived a few days ago. paid full price for unlocked from apple so i could continue with tmobile. the phone didnt arrive with a sim card. had to get mini sim from TM.

regardless of APN settings added, wifi on and off, data roaming on and off, airport , all power on and off. none are guarenteed fixes on my phone nor is the connection consistent. Tmoobile says it must be off the 3g network and isnt compatible with 4g... in order to get a service connection by turning wifi off i can link randomly with the 2g. although that drops and goes to no service as often as well.

why did i buy a iphone 4s with cloud when im expected to disable wifi, inet and use 2g ?....because neither tmobile nor apple mentioned or were aware of the extent of thier conflicts..?? by the way, i love the phone and really respect the help tmobile tried to give ...apple to.

i went to verizon tonight, a supported carrier to change my service. they were unable to turn off 3g, (tmobiles complaint) and unable to find verizon towers to be recognized. we couldnt get the phone past the reset. it searched and only found att. verizon removes the sim and in past cases, he said, places the phone in correct network. (att sim triggers the GMCA network)

apple tech tried to help and all my supports were eager to go home. is thiis phone a lemon or have a glitch and is permanently 'unlocked'? or unlocked but unwilling to regognize anything but the GmCA network?

When the phone leaves the factory.... settings, are they different for ATT vs. Verizon? i thought i was getting the freedom to choose or change service providers?

how do i get a new unlocked apple phone that wont lock on any signal ...commit to the GSM ? does this limit me for updates in the future?

unlocking the sim pin would be helpful especially in europe where there are no conflicting networks vying for signal strength in the same yard....

does anyone have a verizon 4s and know if they have updated APN settings?

My options are return the phone and re-order spacific to which carrier but with the holidays that means wait another ? 3 weeks for phone? Apple suggested a blank sim which ill track down in am. its frustrating.

For all of you:

http://support.apple.com/kb/TS4148

im doing that restore now. i did it with apple tech last night but the updates are different then what we encountered. thanks michal.kos

ill do the ipad2 next ...maybe without the sim card in i can go straight to verizon in am. (i still think this is a network carrier conflict issue but any updates are helpful!)

Tele2 send me a new simcard 4g compatible and it works!

Finally i can use My phone..

somehow i think that this issue is related to the sim card!

Let us know if that really did fix it.

If that really is a solution, well that means people in Ireland are out of luck. We don't have 4G, LTE or any of those flavours.

With max 3G I get about 3Mbps.

This update, released from Apple yesterday, solve the problem.

Remember to reset you’re the network after the update.

http://www.mactrast.com/2011/12/apple-releases-minor-ios-5-0-1-update-for-iphone -4s/

this UPDATE did not help! SAME AS BEFORE after making one call, I can not make second, it says call failed then goes to searching! When if find carrier, again I can make ONE call, then call failed again!!! I am P I S S E D O F F with apple.

The update worked for me!!

The update worked for me. Just updated yesterday night. Now, all my SIM's are working great. Been just 4 hours, and no network search or failure. Will update after 2-3 days of extensive use. But it's still better than it was before. Initially, none of my India SIM's worked for more than 1 hour. Made 1 call and it failed to make the second one. Now, had already made 3-4 calls continuously, received calls and sent/received messages. Happy to see, Apple acknowledged the issue and gave a fix.

Hope, it works for everyone 🙂. Cheers!!!

I had the same problem for a long time. But Apple has published a tweaked update for it. Try this link:

http://support.apple.com/kb/TS4148

So far, it seems to have worked for me, too. (o2 - Germany) It is worth giving it a try!

i downgraded mine to 5.0.1 (9A405) and my baseband has been downgraded as wel!! the 5.0.1 (9A406) didnt help me in any way:/

same problem for me. The 3G network works fine but the cellular signal used for sending/receiving SMSs and calls go from full bar to "Searching..." to "No Service" randomly. I just got my iPhone 4s last Dec 17, 2011, a day after 4S was released here in the Philippines.

after i restored to iOS 5.0.1 (9A406) it seemed that the "searching" problem is solved.but after two days problems started (frequency of the "searching" problem decreased but not lasted)