BlackBerry 8310 old appeared SOS

I bought 8700 for more than half a month.,Basically tossed the bb all over,ROM has been brushed to,The last use is still 114,Now I basically have a general understanding of Blackberry,8700 is very real,But there is a problem that always bothers me.,That is, about 8700Sometimes there is a signal that suddenly doesn't.,Show SIM card error,SOS with red signal bar。 After reading a large number of posts, coupled with my own practice, I once again verified that the solution to SOS should at least be alleviated.

1. The signal SOS appears, and the BB returns to normal again, which has little to do with the hardware of the BB itself. I used to sos three or four times a day, but now it's okay to troubleshoot hardware issues.

2. It doesn't matter much if it's a SIM card, it's basically useless to change a SIM card, and it's a waste of money. I haven't had SOS in the last year with my dynamic zone sim v3.,I'm still SOS on 64K BB around the world.

3、It has nothing to do with ROM.,I've brought it since I bought it)Brush to.,Basically, every ROM is used.,This situation still exists.,In the end, it's still wipe.,Brush into 114 use.。 Of course, there are also individual ones that seem to be . .37 or which ROM signal is not good will appear SOS, change to other versions can be alleviated.

4. According to the forum post, I tried these two points, which method is the most effective now.

a. Change the TLS in the TLS security option to a handheld device.

b. Change the time source in the date and time to off.

5. This is the most feasible way in theory, first of all, before it is changed, BB will often send traffic outward, mini monitor can monitor, the amount of data is not very large, 1 2kb at a time. At this time, BB will switch the signal, because it can be clearly seen that the dynamic zone brand prompt is out, as if it has just been turned on and searched for the Internet. At this point, your BB has completed a network switch.

At this time, if external factors interfere, such as signal strength, placement position, battery level, etc., it may cause BB to fail to switch the signal to 460. At this time, the damn SOS appeared, and the signal could not be found.

6.The two points mentioned in Article 4 are in line with the theoretical explanation, not to let BB automatically switch networks, what kind of services here will cause BB to switch networks, I haven't fully figured it out, but at least one of them wants the server to verify the time, and this is not Chinamobile. Changing TLS to handheld devices also prevents BB from automatically seeking services.

That's the legendary BB stealing traffic.

7. From the four times of SOS in the previous day to the present two days until now, it seems that this method is effective and obvious. %

Hehe, buddy. Your mobile phone is a SIM card that can't be read, generally speaking, it's a problem with the machine.

Because my 7290 was the same two days ago, I just bought it for two days, and the same SIM card works on other mobile phones, but it doesn't work on 7290. Later, it would be nice to go and change the machine.

Hurry up and change it.

In the absence of SOS, you can call, text, etc!!

If the machine itself is fine, then the SOS is your SIM card problem. If you don't believe it, you can unplug the SIM and try it, and it will be SOS if you boot it directly without inserting the card.

It is recommended to wipe the SIM card interface, and there is another point, that is, after inserting the SIM, the card buckle on the outside must be buckled, and check whether it is loose there. I also sos once a few days ago, and I saw that the buckle was not fastened.

When this happens, try to rule it out by pressing the following method:

1. The SIM card is in poor contact with the mobile phone. Remove the SIM card and wipe the metal side with 100 yuan to polish the smooth contact surface. Then open the back cover of the mobile phone, wrap a small stick around cotton, dip it in alcohol, wipe the small copper piece in the contact between the mobile phone and the SIM card, or gently pick up the small copper sheet with a blade.

All of this is designed to make the SIM card more secure in contact with the phone. 2. Dispose of the battery. Also take it off and wipe a few contacts of the battery.

Polished and clean. The battery contacts on the mobile phone should also be polished and cleaned. Many times, what I have encountered is that the power supply is insufficient, resulting in insufficient radio frequency, unable to open the network module of the 7290 mobile phone, resulting in inability to access the Internet.

Try it my way. 3. If it still doesn't work, consider pasting paper on the back of the battery, and then load it into the mobile phone to try. The purpose of this law is also to change the point of contact between the battery and the mobile phone.

4. If it still doesn't work, just contact Berry to play.

The preliminary judgment should be the desoldering of the ** module.

I guess you're going to buy a new one... Mourning!!